Filing taxes intimidates millions of Americans every year, but the process is more manageable than it looks once you break it into clear steps. Whether you are filing for the first time or just want to make sure you are doing it right, this guide walks you through how to file your federal income taxes for the 2025 tax year (due April 15, 2026).
Before You Start: What You Need
Gather the following documents before you open your tax software or sit down with an accountant. Having everything ready upfront saves significant time.
Income Documents
- W-2: From every employer you worked for in 2025. Should arrive by January 31, 2026.
- 1099-NEC: For freelance, contract, or gig work. From any client who paid you $600 or more.
- 1099-INT: Interest income from bank accounts. Any account paying more than $10 in interest sends this.
- 1099-DIV: Dividend income from investments.
- 1099-B: Proceeds from selling investments (stocks, ETFs, mutual funds).
- 1099-G: Unemployment compensation received.
- SSA-1099: Social Security benefits received.
- 1099-R: Distributions from retirement accounts (401k, IRA, pension).
Deduction and Credit Documents
- Mortgage interest statement (Form 1098)
- Property tax receipts
- Charitable contribution receipts
- Student loan interest statement (Form 1098-E)
- Tuition statement (Form 1098-T)
- Childcare provider information (name, address, EIN)
- Health insurance marketplace statement (Form 1095-A) if you had ACA coverage
- HSA contribution and distribution records (Form 5498-SA and Form 1099-SA)
Personal Information
- Social Security numbers for yourself, spouse, and all dependents
- Bank account and routing number for direct deposit refund
- Last year’s tax return (useful for reference, especially your AGI for e-filing verification)
Step 1: Choose Your Filing Status
Your filing status affects your standard deduction, tax brackets, and eligibility for certain credits. The five filing statuses are:
- Single: Unmarried or legally separated as of December 31, 2025
- Married Filing Jointly (MFJ): Married and combining your income on one return — usually the best option for most married couples
- Married Filing Separately (MFS): Married but filing individual returns — rarely advantageous except in specific situations (student loan repayment plans, liability separation)
- Head of Household (HoH): Unmarried with a qualifying dependent — more favorable brackets than Single
- Qualifying Surviving Spouse: Available for two years after a spouse’s death if you have a qualifying dependent child
Step 2: Decide Whether to Take the Standard Deduction or Itemize
This is often the most consequential tax decision. For 2025 tax year (filed in 2026), the standard deduction is:
- Single: $15,000
- Married Filing Jointly: $30,000
- Head of Household: $22,500
You should itemize only if your actual deductible expenses (mortgage interest, state and local taxes up to $10,000, charitable donations, casualty losses) exceed the standard deduction. For most taxpayers — roughly 90% — the standard deduction is larger and simpler. See our companion article on standard deduction vs itemizing for a full breakdown.
Step 3: Choose Your Filing Method
DIY Tax Software
Tax software like TurboTax, H&R Block, FreeTaxUSA, and TaxSlayer walks you through the return in interview format. Most can import your W-2 and 1099 information directly from employers and financial institutions. Cost ranges from free (for simple returns using IRS Free File) to $30-$150 for software handling more complex situations.
IRS Free File
If your adjusted gross income was $84,000 or less in 2025, you can file your federal return for free using IRS Free File partner software. This is an underutilized program — millions of eligible taxpayers pay unnecessarily for software they could get for free.
Professional Tax Preparer
A CPA, enrolled agent, or credentialed tax preparer makes sense if you have complex situations: self-employment income, rental properties, significant investment activity, major life changes, or potential audit risk. Expect to pay $150-$400 for a typical individual return, more for complex situations.
Step 4: Complete Your Return
If using software, simply answer the questions and input the numbers from your documents. The software handles the math and populates the correct forms. Key steps the software walks you through:
- Enter all income sources
- Apply above-the-line deductions (student loan interest, IRA contributions, HSA contributions, etc.)
- Calculate your Adjusted Gross Income (AGI)
- Claim the standard deduction or itemize
- Calculate your taxable income
- Apply the tax brackets to determine your tax liability
- Subtract applicable tax credits (Child Tax Credit, Earned Income Credit, education credits, etc.)
- Compare your tax liability to taxes withheld — determine refund or amount owed
Step 5: Review for Common Errors
The IRS rejects thousands of returns for avoidable mistakes. Before submitting, check:
- Social Security numbers match government records exactly (a single digit error causes rejection)
- All income is reported — including 1099-NEC income, side gig earnings, and interest
- Direct deposit account number is correct
- All dependents are claimed correctly with accurate SSNs
- You signed the return (an unsigned return is not valid)
Step 6: File and Pay
E-filing is faster, more accurate, and results in faster refunds than paper filing. The IRS typically issues e-filed refunds within 21 days when using direct deposit.
If you owe taxes, you can pay via direct debit when filing, through IRS Direct Pay (free), by credit or debit card (convenience fee applies), or by check mailed to the IRS. If you cannot pay in full by April 15, file your return anyway — the failure-to-file penalty (5% of unpaid taxes per month) is much steeper than the failure-to-pay penalty (0.5% per month).
Missed the Deadline? File for an Extension
If you cannot complete your return by April 15, file Form 4868 for an automatic 6-month extension to October 15. Important: an extension to file is not an extension to pay. If you owe taxes, you must estimate and pay by April 15 to avoid penalty and interest.
Key Takeaways
- Gather all income documents (W-2, 1099s) and deduction records before starting
- Check whether you qualify for IRS Free File (AGI under $84,000)
- The standard deduction is the right choice for most taxpayers
- E-file and use direct deposit for the fastest refund
- If you owe and cannot pay in full, still file on time — the failure-to-file penalty is severe
- An October extension is available but does not extend your payment deadline
Tax filing does not have to be stressful. With your documents organized and a reliable tax software tool, most individual returns can be completed in under two hours. The key is starting early, being thorough, and not leaving money on the table by missing legitimate credits and deductions.