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Estimated tax, deadlines, and IRS problems

Quarterly estimates and safe harbors, the filing calendar, audits, notices, penalty abatement, payment plans, and what to do about unfiled returns.

55 guides, each reviewed by a CPA licensed in the US and Canada.

Small Business & Bookkeeping

1031 Like-Kind Exchange Rules: Deadlines, Identification, and Common Mistakes That Blow Up Exchanges

A 1031 like-kind exchange under IRC 1031 allows an investor to defer all capital gains and depreciation recapture taxes when selling an investment.

Sep 5, 2026
Small Business & Bookkeeping

2025 Small Business Tax Calendar: Every Federal Deadline You Need to Know

Every federal tax deadline for small businesses in 2025, organized by month. 2025 tax calendar (federal deadlines, calendar-year businesses): January: |.

Sep 5, 2026
Small Business & Bookkeeping

Amended Tax Returns (Form 1040-X): When and How to Fix a Mistake

File Form 1040-X to correct errors on a filed return within 3 years of filing or 2 years of paying the tax, whichever is later.

Sep 5, 2026
Small Business & Bookkeeping

Amending Your Tax Return: Form 1040-X Timing, Strategy, and When It Actually Makes Sense

Form 1040-X allows taxpayers to amend previously filed returns within 3 years of the original filing date (or 2 years from the date tax was paid.

Sep 5, 2026
Small Business & Bookkeeping

Annualized Installment Method: How to Avoid Estimated Tax Penalties With Irregular Income

Business owners with seasonal or irregular income can use the annualized installment method (Form 2210 Schedule AI) to calculate estimated tax payments.

Sep 5, 2026
Small Business & Bookkeeping

Avoiding Estimated Tax Penalties: Safe Harbor Methods, Annualized Income, and Year-End Fixes

The IRS assesses estimated tax underpayment penalties when quarterly payments fall short. The estimated tax penalty (IRC 6654 for individuals, IRC.

Sep 5, 2026
Small Business & Bookkeeping

Avoiding the Estimated Tax Penalty: Three Safe Harbor Methods and When to Use Each

The estimated tax penalty (7-8% annualized in 2025) is fully avoidable using one of three safe harbors: prior-year (100%/110% of last year's tax).

Sep 5, 2026
Small Business & Bookkeeping

Business Gift Deduction: The $25 Per Person Limit and How to Maximize It

Under IRC 274(b), the deduction for business gifts is limited to $25 per recipient per year. This cap has not been adjusted for inflation since 1962.

Sep 5, 2026
Small Business & Bookkeeping

Choosing a Tax Year: Calendar Year vs. Fiscal Year for Small Businesses

Most small businesses must use a calendar year (January 1 through December 31) for tax purposes. Sole proprietorships always use a calendar year.

Sep 5, 2026
Small Business & Bookkeeping

Employee Retention Credit (ERC) Status in 2025: Moratorium, Audits, and Voluntary Disclosure

ERC status as of 2025: 1. Moratorium on new claims. The IRS stopped processing new ERC claims filed after September 14, 2023.

Sep 5, 2026
Small Business & Bookkeeping

Estimated Tax Penalty Calculation: How the IRS Computes Underpayment Penalties

The IRS charges an estimated tax penalty (Form 2210) when quarterly payments fall short.

Sep 5, 2026
Small Business & Bookkeeping

Estimated Tax Safe Harbor Strategies: How to Avoid Underpayment Penalties Every Time

The IRS imposes penalties for underpaying estimated taxes, but two safe harbors provide complete protection. The two safe harbors: Safe Harbor 1:.

Sep 5, 2026
Small Business & Bookkeeping

Estimated Tax Safe Harbor: How to Avoid the Underpayment Penalty Every Year

The IRS imposes an estimated tax penalty when a taxpayer owes more than $1,000 at filing time and did not meet one of two safe harbors.

Sep 5, 2026
Small Business & Bookkeeping

Estimated Tax Safe Harbors: The 110% Rule, Annualized Income Method, and Penalty Avoidance

Self-employed business owners must pay quarterly estimated taxes or face penalties. The 110% prior-year safe harbor eliminates penalties even if income.

Sep 5, 2026
Small Business & Bookkeeping

Estimated Taxes for First-Year Business Owners: What to Pay When You Have No Prior-Year Return

First-year business owners with no prior-year tax liability have no safe harbor and must estimate current-year taxes accurately.

Sep 5, 2026
Small Business & Bookkeeping

First-Time Penalty Abatement: How to Get IRS Penalties Removed With One Phone Call

The IRS First-Time Penalty Abatement (FTA) under IRM 20.1.1.3.6.1 allows qualifying taxpayers to have failure-to-file and failure-to-pay penalties removed.

Sep 5, 2026
Small Business & Bookkeeping

Home Office Deduction: How to Make It Audit-Proof (Regular Method vs Simplified)

Home office deduction requirements (IRC 280A): The two tests (both must be met): 1. Regular use. The space must be used on a regular basis for business.

Sep 5, 2026
Small Business & Bookkeeping

How to Avoid Estimated Tax Penalties in Your First Year of Business

First-year business owners have no prior-year tax liability, making the prior-year safe harbor the easiest penalty-free strategy.

Sep 5, 2026
Small Business & Bookkeeping

How to Avoid the IRS Estimated Tax Penalty: Safe Harbor Rules and Payment Strategies

Quarterly estimated taxes are due April 15, June 15, September 15, and January 15. Missing a payment triggers an automatic penalty per IRC 6654.

Sep 5, 2026
Small Business & Bookkeeping

How to Avoid the IRS Estimated Tax Underpayment Penalty

The estimated tax underpayment penalty is approximately 8% annualized (2024-2025). It applies per quarter, not per year.

Sep 5, 2026
Small Business & Bookkeeping

How to Calculate the Estimated Tax Penalty: Form 2210 and the Underpayment Math

The estimated tax underpayment penalty is calculated on Form 2210. It applies quarter-by-quarter based on the IRS's short-term interest rate.

Sep 5, 2026
Small Business & Bookkeeping

How to Respond to an IRS Audit: Step-by-Step Guide for Small Business Owners

An IRS audit notice is not a criminal investigation. Most audits are correspondence audits resolved by mail. The business owner's response.

Sep 5, 2026
Small Business & Bookkeeping

How to Respond to an IRS Correspondence Audit

Most small business IRS audits are correspondence audits handled by mail. Correspondence audit basics: What triggers one: - Schedule C losses (especially.

Sep 5, 2026
Small Business & Bookkeeping

Innocent Spouse Relief: How to Remove Tax Liability from a Joint Return

IRC 6015 provides relief for spouses who filed joint returns and did not know about their spouse's understatement or omission.

Sep 5, 2026
Small Business & Bookkeeping

IRS Audit Guide for Small Business: What Triggers an Audit and How to Survive One

An IRS audit is a review of your return and records. The statute of limitations is generally 3 years from filing (IRC 6501), with exceptions for omissions.

Sep 5, 2026
Small Business & Bookkeeping

IRS Audit Process for Small Businesses: What to Expect and How to Respond

IRS audit types for small businesses: 1. Correspondence audit (most common). - Conducted entirely by mail. Correspondence.

Sep 5, 2026
Small Business & Bookkeeping

IRS Audit Red Flags for Small Businesses

Certain Schedule C characteristics increase audit risk: high deductions relative to income, cash-intensive businesses, round-number expenses.

Sep 5, 2026
Small Business & Bookkeeping

IRS Audit Red Flags for Small Businesses: What Triggers an Audit and How to Prevent It

The IRS audits approximately 0.4% of individual returns but targets specific patterns: high Schedule C deductions relative to income.

Sep 5, 2026
Small Business & Bookkeeping

IRS Audit Representation: How a CPA Handles Your Audit with Form 2848 Power of Attorney

An IRS audit is not a conviction. It is a review of your return to verify that income, deductions, and credits are reported correctly.

Sep 5, 2026
Small Business & Bookkeeping

IRS Audit Triggers for Small Businesses: Red Flags, Prevention, and What to Expect

The IRS audits about 0.4% of individual returns, but Schedule C filers face higher rates (1-2%). The IRS audits approximately 0.4% of individual tax.

Sep 5, 2026
Small Business & Bookkeeping

IRS Audit Triggers for Small Businesses: What Increases Your Risk

The IRS audits approximately 0.4% of individual returns, but certain patterns increase audit risk: high Schedule C deductions relative to income.

Sep 5, 2026
Small Business & Bookkeeping

IRS Audit Triggers: Schedule C Red Flags for Small Business Owners

Schedule C is the most-audited form on a personal return. Common triggers: reporting a loss (especially multiple years in a row).

Sep 5, 2026
Small Business & Bookkeeping

IRS Audit Triggers: The Red Flags That Increase Your Audit Risk and How to Prevent Them

The overall individual audit rate is approximately 0.4%, but certain factors dramatically increase the odds: high Schedule C income with large deductions.

Sep 5, 2026
Small Business & Bookkeeping

IRS CP2000 Notice: How to Respond When the IRS Says You Underreported Income

CP2000 notice essentials: 1. What it is. An automated underreporter notice under the IRS's Automated Underreporter (AUR) program.

Sep 5, 2026
Small Business & Bookkeeping

IRS Installment Agreement for Small Businesses: Payment Plans for Tax Debt

The IRS offers installment agreements for businesses that cannot pay their full tax liability. When a small business owes taxes it can't pay in full.

Sep 5, 2026
Small Business & Bookkeeping

IRS Installment Agreements: Payment Plans for Small Businesses That Owe Back Taxes

Small businesses that owe $25,000 or less can get a streamlined installment agreement without financial disclosure. Larger balances require Form 433-B.

Sep 5, 2026
Small Business & Bookkeeping

IRS Offer in Compromise: How to Settle Tax Debt for Less Than You Owe

An Offer in Compromise (OIC) under IRC 7122 allows taxpayers to settle their IRS tax debt for less than the full amount owed when they can demonstrate.

Sep 5, 2026
Small Business & Bookkeeping

IRS Offer in Compromise: Settling Tax Debt for Less Than You Owe

An offer in compromise (OIC) is an agreement between a taxpayer and the IRS to settle a tax debt for less than the full amount owed.

Sep 5, 2026
Small Business & Bookkeeping

IRS Payment Options: Installment Agreements, OIC, and What Happens When You Can't Pay

If you owe taxes and can't pay in full, the IRS offers several payment options. A short-term payment plan (180 days) has no setup fee.

Sep 5, 2026
Small Business & Bookkeeping

IRS Payment Plans and Installment Agreements: Options When You Owe Taxes You Cannot Pay

When a taxpayer owes federal taxes they cannot pay in full, the IRS offers several payment options under IRC 6159. Covers key rules, filing requirements,.

Sep 5, 2026
Small Business & Bookkeeping

IRS Payment Plans for Small Business Tax Debt: Installment Agreements, OIC, and Currently Not Collectible

Business owners who owe taxes they cannot pay in full have options: short-term payment plans, long-term installment agreements, Offer in Compromise.

Sep 5, 2026
Small Business & Bookkeeping

IRS Penalty Abatement: First-Time Abatement, Reasonable Cause, and How to Get Penalties Removed

IRS penalties can be abated through first-time abatement (administrative waiver) or reasonable cause. FTA is the easier path and requires no documentation.

Sep 5, 2026
Small Business & Bookkeeping

IRS Penalty Abatement: First-Time Penalty Relief, Reasonable Cause, and How to Request It

The IRS imposes penalties on late filing (IRC 6651(a)(1), 5% per month up to 25%), late payment (IRC 6651(a)(2), 0.5% per month up to 25%).

Sep 5, 2026
Small Business & Bookkeeping

IRS Power of Attorney (Form 2848): How to Authorize Your CPA to Represent You Before the IRS

Form 2848 (Power of Attorney and Declaration of Representative) authorizes a CPA, enrolled agent, or attorney to represent you before the IRS.

Sep 5, 2026
Small Business & Bookkeeping

IRS Reasonable Cause Penalty Abatement: How to Get Tax Penalties Removed

The IRS removes penalties when the taxpayer demonstrates reasonable cause (not willful neglect). IRS penalties aren't final.

Sep 5, 2026
Small Business & Bookkeeping

IRS Statute of Limitations: How Long the IRS Has to Audit, Assess, and Collect

The IRS does not have unlimited time to audit your return, assess additional taxes, or collect on a tax debt. Statute of limitations overview.

Sep 5, 2026
Small Business & Bookkeeping

Quarterly Bookkeeping Checklist for Small Business Owners

Every quarter: reconcile bank and credit card accounts, categorize transactions, review profit and loss, calculate estimated tax payment.

Sep 5, 2026
Small Business & Bookkeeping

Record-Keeping Requirements: What to Keep, How Long, and What the IRS Actually Needs

The IRS requires records to support income, deductions, and credits claimed on tax returns. Record retention periods. Covers key rules, filing.

Sep 5, 2026
Small Business & Bookkeeping

Schedule C Audit Triggers: What the IRS Looks For in Small Business Returns

Certain patterns on Schedule C increase the likelihood of an IRS audit: high deductions relative to income, cash-intensive businesses, consistent losses.

Sep 5, 2026
Small Business & Bookkeeping

Self-Employed Quarterly Tax Payment Calendar and Deadlines for 2025

Self-employed individuals must pay estimated taxes quarterly: April 15, June 15, September 15, and January 15. 2025 estimated tax payment calendar: |.

Sep 5, 2026
Small Business & Bookkeeping

Small Business Sales Tax: Nexus Rules, Collection Obligations, and Common Mistakes

After South Dakota v. Wayfair (2018), businesses can have sales tax nexus in states where they have no physical presence.

Sep 5, 2026
Small Business & Bookkeeping

Small Business Tax Calendar 2025: Every Deadline for Estimated Taxes, Payroll, and Filing

Every quarterly and annual tax deadline for small business owners in 2025, including estimated tax payments, payroll tax deposits, information returns.

Sep 5, 2026
Small Business & Bookkeeping

Small Business Tax Calendar 2025: Every Filing Deadline

A complete calendar of federal tax filing deadlines for small businesses in 2025, including quarterly estimated taxes, payroll deposits, Form 941.

Sep 5, 2026
Small Business & Bookkeeping

Small Business Tax Calendar: Every Federal Deadline for Sole Proprietors, S-Corps, and Partnerships

A complete calendar of federal tax deadlines for small businesses: estimated tax payments, payroll deposits, Form 941, W-2/1099 filing, S-Corp returns.

Sep 5, 2026
Small Business & Bookkeeping

Small Business Tax Deadlines: Complete Calendar (2025-2026)

Every tax deadline for sole proprietors, S-Corps, C-Corps, and partnerships. Missing a tax deadline triggers automatic penalties.

Sep 5, 2026

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