State vs. Federal Tax Return: Do You Need Both?
Published November 4, 2026
A federal return is your income tax return for the IRS. For most individuals, that return is Form 1040. A state return goes to your state's tax agency. The two returns are separate. Each one goes to a different agency.
Do not assume the answer is the same in every state. This guide explains how the two returns relate. It also shows where to find your state's rules.
Federal and state are separate
The IRS handles federal income tax. The IRS describes Form 1040 as the form U.S. taxpayers use to file an annual income tax return. IRS: About Form 1040
Each state has its own tax agency. The IRS publishes a page that links to state government websites. The list includes all 50 states and the District of Columbia. Each state site has information about taxation for that state. IRS: State government websites
Where your state rules come from
Start with the IRS list of state government websites. Pick your state from the list. Then read the tax pages on that site. Those pages are where your state publishes its own information.
Use your state's site for state questions. Use the IRS for federal questions. If you are not sure which agency answers a question, start with the state list.
Your state taxes can affect your federal return
On the federal return, you can itemize deductions instead of taking the standard deduction. IRS Topic 501 says itemized deductions may include state and local income or sales taxes. So the state taxes you paid can change your federal return. IRS Topic 501
The standard deduction is a flat dollar amount. It depends on your filing status. It can also depend on your age, whether you are blind, and whether another taxpayer can claim you as a dependent. IRS Topic 551
The IRS says that in most cases, your federal income tax will be less if you take the larger of your itemized deductions or your standard deduction. IRS: About Schedule A
This choice is part of the federal return. Do not assume your state uses the same choice. Check your state's instructions before you file.
Refunds are tracked separately
The IRS refund page covers your federal refund. It says your refund status is available 24 hours after you e-file a current year return. It is available 4 weeks after you file a paper return. IRS: Refunds
To check without signing in, you need four items from your return. You need the exact refund amount, your Social Security number or ITIN, your filing status, and the tax year.
The IRS says a typical e-filed refund takes about 3 weeks. A mailed return can take 6 weeks or more from the date the IRS receives it.
A state refund is a separate question. Ask your state tax agency about a state refund. Use the state site you found on the IRS list.
State debt can reduce a federal refund
The IRS says your refund may be reduced to pay past due debt. That can include child support, federal agency nontax debt, or state income tax. The Bureau of the Fiscal Service sends a notice about the offset. The IRS does not receive the details of the offset. IRS: Refunds
If your refund is smaller than you expected, read any notice you receive about the offset.
Common mistakes
- Forgetting to sign your return. The IRS lists this as a common reason for a delay.
- Making a math error. The IRS lists this too.
- Filing an amended return. The IRS must compare and review both returns, which takes more time.
- Mixing up the federal and state refund. Each agency tracks its own refund.
A simple checklist
- Did you earn income in your state?
- Does your state have an individual income tax? Check the state site from the IRS list.
- Do you have the figures from your federal return ready?
- Did you choose between the standard deduction and itemizing on the federal return?
- Did you read your state's instructions before you file?
Short FAQ
Do I file a state return if I file a federal return? It depends on your state. Check your state's tax agency. The IRS list of state websites is the starting point.
Can the IRS tell me my state refund? The IRS refund page covers IRS refunds. Ask your state tax agency about a state refund.
Can state taxes change my federal return? They can, if you itemize. State and local income taxes can be part of your itemized deductions.
Where should I start? Start with the IRS page of state government websites. Pick your state.
General education only, not tax advice. State rules change. Check your state's tax agency for the rules that apply to you.
Sources: IRS: State government websites · IRS Topic 501 · IRS Topic 551 · IRS: About Form 1040 · IRS: About Schedule A · IRS: Refunds
If you want to see the process from start to finish, See how it works.
Sources: IRS: State government websites (irs.gov/businesses/small-businesses-self-employed/state-government-websites); IRS Topic 501, Should I itemize? (irs.gov/taxtopics/tc501); IRS Topic 551, Standard deduction (irs.gov/taxtopics/tc551); IRS: About Form 1040 (irs.gov/forms-pubs/about-form-1040); IRS: About Schedule A (Form 1040) (irs.gov/forms-pubs/about-schedule-a-form-1040); IRS: Refunds (irs.gov/refunds) This is general information, not advice about your specific return.
