Filing your federal and state taxes in 2026 can be straightforward. Here's a step-by-step guide on what to gather, which forms you'll need, where to file, key deadlines for 2026, possible costs, and mistakes to watch out for.
Quick reference
- Tax day (2026 filing for 2025 income): April 15, 2026.
- File Form 1040 for federal returns.
- Request a filing extension with Form 4868 by April 15, 2026; extension gives until Oct. 15, 2026 to file. You still must pay estimated tax due by April 15.
- No broad-based state income tax in seven states: Alaska, Florida, Nevada, South Dakota, Texas, Washington, Wyoming.
- Common penalties: failure-to-file is 5% of unpaid tax per month (up to 25%); failure-to-pay is 0.5% per month (up to 25%).
- Official starting points: https://www.irs.gov and https://www.usa.gov/state-tax-agencies.
Prerequisites — what you need before you start
Get these ready before you open your tax software or mail an envelope. You’ll save time and avoid mistakes.
- Personal data: Social Security numbers or ITINs for you, spouse and dependents.
- Income forms: W-2s, 1099-NEC/1099-MISC/1099-INT/1099-DIV, Form 1099-R, K-1s, unemployment 1099s.
- Proof of expenses and deductions: mortgage interest (Form 1098), student loan interest, tuition 1098-T, childcare provider info (including EIN), health coverage forms (1095 series) if applicable.
- Records for credits: receipts for energy-efficient home improvements, adoption costs, charitable donations (cash and noncash), and medical expenses if you’ll itemize.
- Prior-year tax return — helps fill carryovers and identify last year’s AGI for e-file identity verification.
- Bank routing and account numbers for direct deposit or direct debit.
Step-by-step: How to file taxes in the states (federal + state)
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First, decide if you want to file on your own, use tax software, or hire a professional. Options: IRS Free File (for eligible taxpayers), commercial tax software (TurboTax, H&R Block, TaxAct), or a CPA/enrolled agent. IRS Free File is available via IRS.gov; many commercial packages offer free federal filing for simple returns and charge for state returns.
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Decide federal filing method. E-file is fastest and most secure. Paper-file only if you have special circumstances. To e-file, use IRS-approved software or a tax pro. Mail paper Form 1040 to the address listed on irs.gov if you must paper-file.
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Complete Form 1040 and required schedules. Typical additions: Schedule 1 for additional income/adjustments, Schedule C for self-employment income, Schedule SE for self-employment tax, Schedule A to itemize. Self-employed people must calculate estimated taxes and may need to pay quarterly.
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Figure your state return. Each state has its own forms and rules. Go to https://www.usa.gov/state-tax-agencies to find your state’s Department of Revenue. Follow state instructions for filing thresholds, credits and deductions. If your state allows e-file through commercial software, you can often file both federal and state returns in one package.
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Pay what you owe or set up a payment. You can pay online at IRS.gov using Direct Pay (no fee), or set up an Electronic Federal Tax Payment System (EFTPS) account (no fee). Paying by credit or debit card is possible but carries a merchant fee — typically about 1.8%–2.3% depending on the processor plus a small fixed charge. States offer similar online payment options; some accept direct bank payments for free, while others use card processors with fees.
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File by the deadline: April 15, 2026 for 2025 returns. If you need more time to file, submit Form 4868 by April 15, 2026. That extends filing time to Oct. 15, 2026 but doesn't extend time to pay. Estimate and pay taxes owed by April 15 to avoid penalties and interest.
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Get your refund or confirm payment. If you e-file and choose direct deposit, refunds are typically issued within about 21 days when the return has no issues. State refund timing varies widely — check your state revenue website for averages and status tools.
Costs and fee specifics
Costs vary by method. Expect these ranges in 2026.
- DIY e-file using commercial software: free to $120 for federal; state returns often $30–$50 each. Simple returns may be free.
- Tax pro/CPA: $200–$800+ depending on complexity. Average fees rise with business returns, itemizing, or multiple state returns.
- Extension filing (Form 4868): free to file electronically; if using a paid software or pro, expect the usual software fee or professional fee.
- Payment fees: IRS Direct Pay and EFTPS are free. Card payments cost roughly 1.8%–2.3% plus a $2–$3 processor fee for many providers. State card processors charge similar rates.
Tips — small moves that save time and money
- File early and e-file so you can catch errors quickly and get your refund sooner.
- Use direct deposit. It’s fast and free.
- Keep digital copies. Scan W-2s, 1099s and receipts and keep them seven years for audit safety.
- Check withholding now. Use IRS withholding estimator at irs.gov to avoid big balances next year.
- If self-employed, pay estimated quarterly tax to avoid penalties: April 15, June 15, Sept. 15, and Jan. 15 of the following year are usual quarterly due dates for income earned during the year.
Common mistakes to avoid
- Don’t miss the payment deadline. An extension to file doesn’t extend time to pay. Interest and penalties accrue on unpaid balances after April 15, 2026.
- Don’t forget state filing rules. Living in or earning income in another state can trigger a second state return. File a part-year or nonresident return if required.
- Don’t claim credits without documentation. Earned Income Tax Credit, Child Tax Credit and education credits have eligibility tests and documentation requirements. Incorrect claims slow refunds and can trigger audits.
- Don’t mix up Social Security numbers. Enter SSNs/ITINs exactly — mismatches will reject e-filed returns.
- Don’t mail without proof. If you paper-file, use certified mail or another tracked method — and keep proof of mailing by the deadline.
Alternatives and comparisons
- Free vs paid software: Free packages work for simple W-2 and standard deduction returns. Paid tiers add guidance for itemizing, investments, rental property, or self-employment.
- Tax pro vs DIY software: A pro helps with complex returns, audits, multi-state filings and tax planning. Software is cheaper and fine for straightforward returns.
- Extension vs paying: File Form 4868 to stop a late-filing penalty. But if you suspect you’ll owe, pay an estimate by April 15, 2026 to avoid a larger late-payment penalty and interest. If you can’t pay in full, apply for an IRS Online Payment Agreement — small balances may be eligible for short-term extensions without big fees.
Where to go for official help
- Federal: https://www.irs.gov — forms, instructions, payment options, Free File and the withholding estimator.
- State: https://www.usa.gov/state-tax-agencies — links to each state’s revenue department, forms and online filing/payment portals.
- For identity or fraud issues: IRS Identity Protection pages on irs.gov and the IRS Identity Protection PIN program if needed.
Filing taxes in the states in 2026 means knowing deadlines, picking the right filing method, and keeping good records. File electronically, pay any owed tax by April 15, 2026, or submit Form 4868 to extend filing to Oct. 15, 2026. Use official sites — irs.gov and your state revenue department — for forms, payments and the latest rules.
