Salaried employees can file a federal income tax return online by collecting their W-2 and any 1099s, choosing a tax software platform (free through the IRS if adjusted gross income is $89,000 or less for tax year 2025), entering the wage and withholding figures the software prompts for, and transmitting the completed Form 1040 electronically before April 15, 2026.1Internal Revenue Service. Use IRS Free File to Conveniently File Your Return at No Cost The rest is knowing which documents to have open, which platform fits your situation, and what the software is actually asking as it moves through the return.
Documents to Have Ready
Start with your Form W-2. Your employer must send it by January 31, and it reports your total taxable wages in Box 1 and the federal income tax already withheld from your paychecks in Box 2.2Social Security Administration. Deadline Dates to File W-2s3Internal Revenue Service. About Form W-2, Wage and Tax Statement If you had more than one job during the year, you will get a separate W-2 from each employer.
Bank and brokerage accounts may generate a Form 1099-INT if they paid you more than $10 in interest.4Internal Revenue Service. About Form 1099-INT, Interest Income If you did freelance or side work and were paid $600 or more by a single client, expect a Form 1099-NEC for that nonemployee compensation.5Internal Revenue Service. Instructions for Forms 1099-MISC and 1099-NEC Income below these thresholds is still taxable even when no form arrives.
Have Social Security numbers on hand for yourself, your spouse if you file jointly, and every dependent you plan to claim. The IRS uses those numbers to match your return against employer records, and without a valid Social Security number for a dependent you cannot claim credits like the Child Tax Credit.
Choosing an Online Filing Platform
If your adjusted gross income for tax year 2025 is $89,000 or less, you qualify for IRS Free File, which offers guided tax preparation through eight partner software companies at no cost.1Internal Revenue Service. Use IRS Free File to Conveniently File Your Return at No Cost Each partner sets its own rules on age, state, and income, so check a few offers before you pick one. These are the same commercial products people otherwise pay for, unlocked for qualifying filers under an IRS agreement.
Above the $89,000 threshold, you can still use Free File Fillable Forms, the electronic version of the paper forms with basic math built in and no interview questions. That works if you already know which lines apply to you. If you don’t, paid software from providers like TurboTax, H&R Block, or TaxAct walks you through an interview format and translates your answers into the correct forms. Paid options typically run from about $30 to over $100 depending on how complex your return is, and most have a mobile app.
Walking Through the Return
Whichever platform you use, the sequence is roughly the same. You confirm your name, address, filing status, and Social Security number, then move to income.
Entering Income
You enter Box 1 wages and Box 2 withholding from your W-2. Most software lets you import the W-2 by employer identification number or by uploading a photo, but typing the numbers works fine. The software then asks about other income: interest from a 1099-INT, side income from a 1099-NEC, and anything else. Those figures roll up into your total income.
Adjustments and Your Deduction
Some expenses come off your income before tax is calculated. You can deduct up to $2,500 of qualifying student loan interest, for instance.6Internal Revenue Service. Topic No. 456, Student Loan Interest Deduction Traditional IRA contributions and certain educator expenses are other common adjustments. What is left after these is your adjusted gross income.
From AGI, you subtract either the standard deduction or your itemized deductions, whichever is larger. For tax year 2025, the standard deduction is $15,750 for single filers, $31,500 for married couples filing jointly, and $23,625 for heads of household.7Internal Revenue Service. Publication 501 (2025), Dependents, Standard Deduction, and Filing Information Most salaried employees take the standard deduction because their mortgage interest, state and local taxes, charitable gifts, and medical costs together don’t clear those numbers. Good software flags it when itemizing would give you more.
The result is your taxable income, which the software runs through the federal brackets automatically.8Internal Revenue Service. Federal Income Tax Rates and Brackets
Credits
Credits reduce the tax you owe dollar for dollar, so they are worth more than deductions of the same size. The Child Tax Credit is worth up to $2,200 per qualifying child for tax year 2025.9Internal Revenue Service. Refundable Tax Credits Education credits and the Earned Income Tax Credit are also common for salaried filers. The interview questions determine which credits you qualify for.
Signing and Submitting
Before transmitting, the software runs a diagnostic to catch math errors, missing Social Security numbers, and empty fields. Fix anything it flags. A rejected return means resubmitting and can delay a refund by weeks.
To sign electronically, you verify your identity with either your prior-year adjusted gross income or a Self-Select PIN from a prior filing.10Internal Revenue Service. Validating Your Electronically Filed Tax Return If the IRS enrolled you in the Identity Protection PIN program after a prior identity-theft incident, you enter that six-digit IP PIN instead, and the return will reject without it.11Internal Revenue Service. Get an Identity Protection PIN Anyone can opt into the IP PIN program voluntarily as extra protection.
Then the software shows a summary of your refund or balance due. If you’re getting a refund, enter your bank routing and account numbers for direct deposit; it’s much faster than a paper check. If you owe, you can authorize an electronic funds withdrawal, pay by credit or debit card, or schedule payment for any date up to April 15. Once the summary looks right, submit. The e-signature has the same legal weight as a handwritten one.
The Filing Deadline and Extensions
Returns for tax year 2025 are due April 15, 2026.12Internal Revenue Service. IRS Announces First Day of 2026 Filing Season; Online Tools and Resources Help With Tax Filing If you can’t finish by then, file Form 4868 for an automatic six-month extension, which moves your filing deadline to October 15, 2026.13Internal Revenue Service. Topic No. 304, Extensions of Time to File Your Tax Return Most tax software submits the extension electronically in a few minutes.
One catch trips people up every year: an extension to file is not an extension to pay. Any tax owed is still due April 15, and interest and penalties on the unpaid balance start the next day.14Internal Revenue Service. Taxpayers Should Know That an Extension to File Is Not an Extension to Pay Taxes If you expect to owe, estimate the amount and send a payment with the extension request.
If You Owe and Can’t Pay
File anyway. The penalty for filing late is far worse than the penalty for paying late, so filing on time is the cheap half of the problem even when you can’t pay. The IRS lets you set up a payment plan online without calling anyone.15Internal Revenue Service. Payment Plans; Installment Agreements
- A short-term plan for individuals who can pay within 180 days and owe less than $100,000 has no setup fee.
- A long-term installment agreement for balances of $50,000 or less has an online setup fee of $22 if you pay by direct debit or $69 for other payment methods.
Interest and the failure-to-pay penalty keep accruing on the unpaid balance under either plan, so pay as much upfront as you can.
Penalties for Filing or Paying Late
The failure-to-file penalty is 5% of the unpaid tax for each month a return is late, capped at 25%.16Internal Revenue Service. Failure to File Penalty The failure-to-pay penalty is 0.5% per month on the unpaid balance, also capped at 25%.17Internal Revenue Service. Failure to Pay Penalty When both apply in the same month, the filing penalty is reduced by the payment penalty amount.
Leaving out income the IRS already knows about, like interest on a 1099-INT, can bring a separate 20% accuracy-related penalty on the underpayment.18Office of the Law Revision Counsel. 26 USC 6662 – Imposition of Accuracy-Related Penalty on Underpayments
After You File
The IRS usually accepts or rejects an e-filed return within 24 to 48 hours. Your software will show the status, and the IRS “Where’s My Refund?” tool updates about 24 hours after a current-year return is e-filed.19Internal Revenue Service. Refunds A rejection is usually a mismatched Social Security number or a wrong prior-year AGI; fix the error and resubmit at no penalty.
Most refunds for e-filed returns with direct deposit arrive within 21 days. Paper checks take longer. Keep a copy of the return and all supporting documents for at least three years from the date you filed, since that is the general window in which the IRS can audit.20Internal Revenue Service. How Long Should I Keep Records?
Fixing a Mistake After Filing
If you notice missing income, a wrong deduction, or another error after submitting, file Form 1040-X to amend. Amended returns for the current year and the two prior tax years can be filed electronically through the same software you used originally.21Internal Revenue Service. Amended Returns To claim a refund on an amended return, file within three years of the original filing date or two years from the date you paid the tax, whichever is later.22Internal Revenue Service. Topic No. 308, Amended Returns Amended returns take 16 weeks or more to process, and you should wait until the IRS has accepted the original return before sending an amendment.