tax-compliance

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tax-compliance

description

Contains verified IRS notice response catalog (CP14/CP501/CP504/CP2000/CP90 triage with deadlines), Form 2220 estimated tax penalty computation (annualized income method, large-corp rules, CAMT relief), and IRS collections resolution paths (streamlined IA thresholds, OIC RCP formula, CDP hearing rights). C-corp tax compliance: deadlines, Form 7004 extensions, estimated payments, amended returns (1120-X), penalty abatement (FTA eligibility, reasonable cause), federal tax lien/levy procedures, CSED tracking, TFRP assessment, tax research hierarchy (IRC/regs/IRM/ATGs), FL F-1120, FL DOR collections. Consult when a client receives an IRS or state notice, needs extension filing guidance, asks about estimated tax installments or underpayment penalties, files an amended return or carryback claim, requests penalty abatement or first-time abatement, faces collections (liens, levies, installment agreements, offers in compromise), or needs to locate authoritative tax law sources.

Tax Compliance

Operational skill for C-corporation tax compliance management — deadlines, extensions, estimated payments, amended returns, IRS/state notice response, collections resolution, and tax research methodology. All guidance targets calendar-year C-corps filing Form 1120 unless otherwise noted.

State-specific scope: Federal deadlines, extensions, estimated tax, amended returns, IRS notice response, penalty abatement, collections, and tax research methodology are nationally applicable. Sections marked (Florida) contain Florida DOR-specific deadlines, collections procedures, and state source references. Practitioners in other states should substitute their state's rules for the Florida-specific sections.

Tax Calendar — Key Deadlines

Federal Form 1120

• Annual return — 15th day of 4th month after year-end (April 15 for calendar-year). PATH Act of 2015 moved the deadline from the 3rd month to the 4th month for tax years beginning after 12/31/2015.
• Extension — File Form 7004 by the original due date for 6 additional months (October 15 for calendar-year). June 30 fiscal year-end gets 7 months through at least TY 2025, transitioning to 6 months for TY 2026+.
• Weekend/holiday shift — Deadlines falling on Saturday, Sunday, or legal holiday (including DC Emancipation Day, April 16) shift to the next business day. DC holidays affect all federal deadlines nationwide.

Estimated Tax Installments

Corporations expecting $500+ in tax liability pay quarterly:

• Q1: April 15 (4th month) — Q2: June 15 (6th month) — Q3: September 15 (9th month) — Q4: December 15 (12th month)
• Each installment = 25% of the required annual payment
• All payments via EFTPS (Electronic Federal Tax Payment System)

Information Returns

• 1099-NEC — January 31 (recipients AND IRS, no automatic extension for IRS copy)
• 1099-MISC/INT/DIV — January 31 to recipients; February 28 (paper) or March 31 (e-file) to IRS
• W-2/W-3 — January 31 to employees and SSA
• E-filing threshold — 10+ information returns of any single type requires e-filing (2024+)

Payroll Tax Deposits

• Monthly depositor (lookback < $50K): 15th of following month
• Semi-weekly depositor (lookback >= $50K): Wed or Fri based on payday
• $100K next-day rule applies regardless of deposit schedule
• Form 941 quarterly: April 30, July 31, October 31, January 31

Florida F-1120 (Florida)

• Due date matches federal (April 15 for calendar-year corps)
• Extension follows federal — file Form 7004 for automatic FL extension
• Estimated tax required if FL tax exceeds $2,500 (same quarterly schedule as federal)
• Penalty: 10% of unpaid tax per month, max 50%; interest accrues from original due date

Extension Filing — Form 7004

Form 7004 grants an automatic extension of time to file — no justification required. It does not extend the time to pay.

Decision Points

1. Can the return be filed by the original due date? If no, file Form 7004 before the deadline. A late-filed extension is invalid.
2. Can the full tax liability be paid by the original due date? If no, pay at least 90% by the original due date to avoid the late-payment penalty. File the extension regardless.
3. E-file or paper? Prefer e-filing (IRS.gov/Efile7004). Paper filing while e-filing the return can trigger late-filing notices due to processing timing.
4. June 30 FY? Check whether 7-month (pre-2026) or 6-month (2026+) extension applies.

Penalty Exposure When Extended

• Late-filing penalty: 5% of unpaid tax per month, up to 25% (assessed only if filed after extended due date)
• Late-payment penalty: 0.5% per month from the original due date, up to 25%
• Interest: accrues from the original due date regardless of extension

Corporate Safe Harbor

If 90%+ of tax shown on the return is paid by the original due date, the late-payment penalty is waived provided the balance is paid by the extended due date.

Estimated Tax — Quarterly Payments

When Required

A C-corp must make estimated payments if expected tax liability (after credits) is $500 or more.

Safe Harbor Rules

The required annual payment is the lesser of:

1. 100% of current-year tax, or
2. 100% of prior-year tax (must have filed a full 12-month prior-year return)

Large corporation exception ($1M+ taxable income in any of the 3 preceding years): prior-year safe harbor applies only to Q1. Installments 2-4 must be based on current-year tax. Any Q1 shortfall must be made up by Q2.

Uneven Income Methods

• Annualized income installment method — standard periods: 3, 3, 6, 9 months with multipliers 4, 4, 2, 1.33. Reduces penalties for corporations with seasonal or lumpy income.
• Adjusted seasonal installment method — available if base period percentage for any 6 consecutive months is 70%+.
• Form 2220 automatically applies the smallest required installment from all available methods.

Underpayment Penalty (Form 2220)

• Rate: federal short-term rate + 5 percentage points, calculated per underpayment period
• No netting — overpayment in one quarter does not offset underpayment in an earlier quarter
• Waiver available for casualty, disaster, or unusual circumstances
• CAMT relief (2025+): Per Notice 2025-27, exclude Corporate Alternative Minimum Tax from Form 2220 Part I, line 1 calculations

When to File Form 2220

The IRS normally calculates the penalty automatically. File Form 2220 only when using the annualized income, adjusted seasonal, or large-corporation first-installment method.

Amended Returns — Form 1120-X

When to File

• Income, deductions, or credits reported incorrectly
• Contesting or acknowledging an IRS adjustment
• Making or changing an election after the filing deadline
• Filing a carryback claim (NOL, capital loss, or general business credit)

When NOT to Use Form 1120-X

• Estimated tax overpayment quick refund → Form 4466
• Tentative NOL/capital loss carryback refund (within 12 months of loss year-end) → Form 1139
• Accounting method change → Form 3115
• Reportable transaction disclosure → Form 8886

Statute of Limitations

General rule: file within the later of 3 years after original due date (with extensions) or 2 years after the date tax was paid.

Special periods: NOL/capital loss/credit carryback — 3 years after due date of the loss/credit origination year. Bad debts or worthless securities — 7 years.

Form 1139 vs. Form 1120-X for Carrybacks

• Form 1139 — tentative refund; must file within 12 months after loss year-end; ~90-day processing; subject to later audit
• Form 1120-X — full amended return; file within SOL; 3-4 month processing

Interdependent Recomputation

When income changes, recompute: charitable contribution deduction (10% modified taxable income limit), dividends-received deduction, and any deduction or credit dependent on AGI or taxable income.

NOL Carryback/Carryforward Rules

• 2018-2019 losses: TCJA repealed carryback, then CARES Act retroactively allowed 5-year carryback
• 2020 losses: 5-year carryback (CARES Act)
• 2021+ losses: no carryback; indefinite carryforward; 80% of taxable income limitation
• Pre-2018 losses: 2-year carryback, 20-year carryforward, no percentage limitation

IRS Notice Response

Triage Framework

1. Identify the notice type — number in upper right corner of page 1
2. Check the deadline — response dates are hard deadlines; missing them forfeits rights
3. Verify the assessment — cross-check against filed return and payment records
4. Determine response path — agree (pay), partially agree (partial payment + response), or disagree (dispute with documentation)

Common Notice Types

Balance due sequence: CP14 (initial, 21-30 days) → CP501 (reminder, 30 days) → CP503 (urgent, 30 days) → CP504 (intent to levy state refund, 30 days) → LT11/CP90/CP297 (final notice, 30-day CDP rights)

Other critical notices:

• CP2000 — information return mismatch (1099/W-2 vs return). Not an audit. 30-day response.
• CP59/CP515/CP518 — unfiled return inquiries, escalating. CP518 triggers substitute for return.
• CP3219A (90-day letter) — statutory notice of deficiency. Must petition Tax Court within 90 days or assessment is final. No extension.
• LTR 1058/LT11 — final notice of intent to levy with CDP rights (30 days)
• LTR 3172/LT14 — notice of federal tax lien filing with CDP rights (30 days)

Response Methods

• Fax — fastest for time-sensitive notices (fax number on the notice)
• Certified mail — for statute-sensitive responses (return receipt)
• PPS (Practitioner Priority Service) — 866-860-4259, weekdays 7 AM-7 PM local time
• PPS limits: 5 clients per call; 30 transcript requests per client

Form 2848 Power of Attorney

• Specific form type AND specific tax years required on Line 3 (no general references)
• Future years cannot exceed 3 years from December 31 of the year IRS receives the form
• Submit electronically via Tax Pro Account or fax to [phone]
• Maximum 2 representatives may receive copies of IRS notices

Penalty Abatement

First-Time Abatement (FTA)

Qualifying penalties: failure to file (6651(a)(1)), failure to pay (6651(a)(2)/(a)(3)), failure to deposit (6656).

Eligibility: same return type filed for prior 3 years, no penalties in prior 3 years (or removed for acceptable reason other than FTA), fewer than 4 failure-to-deposit codes in prior 3 years, all required returns filed, tax paid or arranged.

How to request: call PPS or the number on the notice. IRS checks compliance history automatically. No documentation needed. Can also submit Form 843.

Strategy: FTA is a one-time benefit per 3-year cycle. Apply it to the largest penalty year. For catch-up filings with multiple penalty years, use FTA on the highest penalty and reasonable cause on the others.

Reasonable Cause

Standard: did the taxpayer exercise "ordinary business care and prudence" but was still unable to comply?

Valid circumstances: fire/disaster/civil disturbance, death/serious illness of taxpayer or immediate family, inability to obtain records, system issues preventing timely e-filing, erroneous IRS advice (must document), reliance on tax professional (limited).

Not valid alone: lack of knowledge, simple mistakes, insufficient funds.

Does not apply to: estimated tax penalties (IRC 6655 for corporations).

Submission: written statement with Form 843 or letter explaining circumstances, plus supporting documentation.

Delinquent Filer Sequence

1. File all returns first — abatement cannot be evaluated until returns are filed
2. Apply FTA to the largest penalty year
3. Prepare reasonable cause letters for remaining years
4. Interest on abated penalties is automatically removed
5. Request abatement before formal penalty notices are issued when possible

IRS Collections Resolution

Collection Sequence

Assessment → CP14 (notice and demand) → escalating notices (30-60 day intervals) → federal tax lien (automatic upon assessment + demand + nonpayment) → levy authority (after final notice and 30-day CDP period)

10-Year Collection Statute (CSED)

IRS has 10 years from date of assessment to collect (IRC 6502). The CSED can be suspended by: installment agreement, OIC consideration, CDP hearing, bankruptcy, taxpayer abroad 6+ months, or voluntary waiver (Form 900).

Resolution Paths

Determine ability to pay first (Form 433-B analysis):

• Full pay → pay in full
• Partial pay capability → installment agreement
• No ability to pay → currently not collectible (CNC) or offer in compromise (OIC)

Installment Agreements

• Streamlined — balance $50K or less, up to 72 months, no financial disclosure. Direct debit required for $25,001-$50,000.
• Non-streamlined — $50,001-$250,000, Form 433-F/433-B required, IRS sets minimum payment
• Regular — over $250,000, Form 433-A/433-B, full asset/income disclosure, may require asset liquidation
• IBTF Express — employment tax, $25,000 or less, 24 months, direct debit
• User fees: online direct debit $22, online non-direct-debit $69, phone/mail higher

Offer in Compromise (OIC)

Three grounds: doubt as to liability (Form 656-L, no fee), doubt as to collectibility (Form 656, $205 fee), effective tax administration (Form 656).

RCP formula: Net Equity in Assets + (Monthly Disposable Income x Future Income Multiplier). Lump sum multiplier = 12 months; periodic = 24 months.

OIC is rejected if the taxpayer can full-pay through an IA within the CSED. IRS has 24 months to decide (deemed accepted if no decision). Requires 5 years of compliance post-acceptance.

Collection Due Process (CDP)

CDP rights arise upon NFTL filing notice (IRC 6320) or final levy notice (IRC 6330) — 30 days to request a hearing. Missing the window limits the taxpayer to an equivalent hearing without Tax Court petition rights.

Trust Fund Recovery Penalty (TFRP — IRC 6672)

For employment tax debts, assessed against any responsible person who willfully failed to pay over trust fund taxes. Personal liability equal to 100% of the unpaid trust fund portion. Determined via Form 4180 interview.

Florida DOR Collections (Florida)

• Assessment sequence: DR-831 (30 days) → NOPA (60 days to protest) → Warrant
• FL DOR may compromise debts under F.S. 213.21 (same factors as IRS OIC)
• IRS changes must be reported to FL within 60 days (Form DR-848)
• Interest: prime + 4% (adjusted Jan 1 and Jul 1)

Tax Research Methodology

Research Hierarchy (Most Authoritative First)

1. IRC statute — uscode.house.gov or Cornell LII (law.cornell.edu/uscode/text/26)
2. Treasury Regulations — ecfr.gov (Title 26). Regs say HOW; the IRC says WHAT. Numbering mirrors IRC (Reg 1.162-1 interprets IRC sec 162).
3. Revenue Rulings and Revenue Procedures — published IRS positions in the Internal Revenue Bulletin (irs.gov/irb)
4. IRS Notices and Announcements — transitional guidance, often precedes formal regulations
5. Audit Technique Guides and Issue Snapshots — reveals IRS examination focus and position
6. Internal Revenue Manual — IRS internal procedures; highly persuasive in notice disputes. Key parts: IRM 4.10 (examination), 5.1 (collection), 20.1 (penalties)
7. PLRs and CCAs — fact-specific guidance (cannot be cited as precedent per IRC 6110(k)(3) but reveal IRS reasoning)
8. Tax Court opinions — judicial interpretation. Regular opinions establish precedent; memo opinions apply existing law.
9. IRS Publications — plain-language summaries, not primary authority

Key Practitioner Portals

• Tax Pro Account (taxproaccountportal.irs.gov) — client balances, payment history, notices, digital POA/TIA submission
• e-Services Portal — TIN Matching, Transcript Delivery System, e-file management
• EFTPS (eftps.gov) — estimated payments, balance due payments, payroll deposits
• PPS — 866-860-4259, practitioner account inquiries and adjustments

Florida State Sources (Florida)

• FL Statutes Chapter 220 (leg.state.fl.us) — corporate income tax
• FL DOR TIPs and TAAs (floridarevenue.com) — interpretive guidance and binding advisements
• FL Admin Code Chapter 12C (flrules.org) — corporate income tax rules

Supporting References

Read these for deeper detail when the synthesized content above is insufficient:

• references/tax-calendar.md — Full deadline tables for Form 1120, information returns, payroll deposits, Florida F-1120, and weekend/holiday shift rules. Year-by-year variance table covering PATH Act changes. Read when computing exact deadlines for a specific tax year or fiscal year-end.

  • Key sections: Federal Form 1120 Deadlines, Estimated Tax, Information Return Deadlines, Payroll Tax Deposit Schedules, Florida F-1120 Deadlines, Year-by-Year Variance Table

• references/extension-7004.md — Extension period rules by entity type, electronic vs paper filing, payment requirements, corporate safe harbor for late payment penalty. Read when advising on extension filing decisions or computing extended due dates for non-standard fiscal years.

  • Key sections: Extension Periods, Filing Requirements, Payment Requirements, Decision Points, Year-by-Year Variance Table

• references/estimated-tax-1120w.md — Annualized income installment method details (standard/alternative periods and multipliers), adjusted seasonal installment method eligibility, Form 2220 filing requirements, CAMT relief provisions. Read when computing estimated tax for corporations with uneven income or evaluating underpayment penalty exposure.

  • Key sections: Large Corporation Rules, Annualized Income Installment Method, Underpayment Penalty, CAMT Relief, Method Selection

• references/amended-1120x.md — Form 1120-X column structure, interdependent item recomputation, carryback claim procedures (attachments, Form 1139 comparison), signature requirements, SOL computation. Read when preparing an amended return or evaluating whether a correction is within the statute of limitations.

  • Key sections: When NOT to Use Form 1120-X, Statute of Limitations, Carryback Claims, NOL Carryback/Carryforward Changes

• references/notice-response.md — Complete CP and LTR notice catalog, Form 2848 POA filing details, PPS capabilities and limits, FTA eligibility criteria, reasonable cause standards, delinquent filer abatement sequence, federal and FL statute of limitations. Read when responding to a specific notice type or preparing a penalty abatement request.

  • Key sections: IRS Notice Types, Response Procedures, Form 2848 Power of Attorney, First-Time Abatement, Reasonable Cause, Statute of Limitations, Florida DOR Notice Procedures

• references/irs-collections.md — IRS notice sequence table, federal tax lien mechanics (automatic lien vs NFTL, release/withdrawal/subordination), levy authority and exempt property, installment agreement types and thresholds, OIC grounds and RCP computation, CNC status, CDP hearing scope, TFRP, FL DOR collections. Read when evaluating resolution options for an outstanding balance or responding to lien/levy notices.

  • Key sections: 10-Year CSED, Installment Agreements, Offer in Compromise, Currently Not Collectible, Collection Due Process, Trust Fund Recovery Penalty, Florida DOR Collections

• references/tax-research-tools.md — Complete catalog of primary law sources, IRS practitioner portals, published guidance types, case law databases, Florida state sources, commercial research platforms, and free calculation/filing tools. Research hierarchy with authoritative ranking. Read when you need to locate a specific IRS resource, cite authoritative law, or advise on research tooling.

  • Key sections: Primary Law Sources, IRS Practitioner Portals, IRS Published Guidance, Research Hierarchy, Florida State Sources, How Skills Should Use This File

Cross-Plugin References

For related compliance and reporting workflows:

• Invoke tax-prep:form-1120-prep for return preparation that drives deadlines and extension decisions
• Invoke tax-prep:state-returns for Florida F-1120 return preparation and state-specific compliance
• Invoke tax-prep:nol-tracking for NOL carryforward utilization affecting amended return and estimated tax computations
• Invoke tax-prep:tax-forms for supporting schedule preparation (Form 2220, Form 4466, Form 1139)
• Invoke tax-prep:e-filing for electronic filing procedures (MeF, Form 7004 e-file, information return e-filing)
• Invoke tax-prep:tax-planning for estimated tax projections and planning strategies
• Invoke tax-prep:business-tax-schema for tax data structures underlying compliance tracking
• Invoke accounting-foundation:entity-profile for corporate entity details affecting filing requirements (EIN, fiscal year, state nexus)
• Invoke accounting-foundation:financial-statements for financial data feeding estimated tax calculations
• Invoke qbo-integration:qbo-reporting for QBO reports supporting notice response verification
• Invoke qbo-integration:qbo-bookkeeping for recording tax payments, refunds, and penalty abatement entries
• Invoke bookkeeping:monthly-close for clean financials that feed compliance deadlines
• Invoke bookkeeping:compliance-reporting for information return filing (1099, W-2) deadlines and procedures
• Invoke financial-planning:tax-provision for tax provision calculations affecting estimated payments

Cross-Plugin Consumers

• firm-operations:engagement-management — deadline tracking and engagement calendar integration
• firm-operations:practice-management — compliance workflow scheduling and practitioner assignments
• firm-operations:quality-compliance — notice response quality review and documentation standards
• tax-prep:form-1120-prep — extension status and filing deadline context for return preparation
• tax-prep:tax-planning — penalty exposure analysis and estimated tax planning
• tax-prep:nol-tracking — amended return carryback claims affecting NOL schedules
• financial-planning:budgeting-forecasting — estimated tax payment timing for cash flow projections