how do i check the box on 1040-SR that asks if my main home was in the U.S. for more than half of 2025?

[DoninGA]

That is asked in the Earned Income Tax Credit section

To enter or delete the Earned Income Credit -

Click on Federal Taxes (Personal using Home & Business)

Click on Deductions & Credits

Click on I'll choose what I work on (if shown)

Under You and Your Family

On Earned Income Credit (EIC), click on the start or update button

[JohnB5677]

The check box on the 1040 for your home being in the United States is specifically for the Earned Income Credit.

• The box can only be checked if you qualify for the Earned Income Credit.
• There are significant age, income and possibly child requirements.
• If the box is not checked, it will not affect your tax return.

See IRS guidance on Earned Income Tax Credit (EIT