You'll need to estimate the following federal amounts:
- Your expected federal refund amount (or amount owed)
- The amount of federal taxes you paid throughout 2025 (federal withholdings from a Form W-2, estimated tax payments, etc.)
If you're not comfortable estimating these amounts, and you still want to file an extension, you can use FreeTaxUSA to estimate them for you. To do this, click
My 2025 Return and enter your information on your regular return, just like you would if you were filing your regular return today. If you're missing tax documents like your
Form W-2, you can enter estimated income amounts (and fix your regular return later once you receive the actual document). You can then come back to this screen and we'll prompt you with our calculated amounts so you can finish your extension.
What if my estimate isn't very accurate?