How do I change my Indiana state return to check the box for married, filing separately?

[JamesG1]

Indiana requires you to use use the married filing status that is reported on your Federal 1040 tax return.  See IT-40 Booklet here.

The Indiana 2023 IT-40 Individual Income Tax Booklet, page 5 states:

Married Filing Requirements 

Married Filing Jointly 

If you filed your federal income tax return as married filing jointly, you also must file married filing jointly with Indiana.

Married Filing Separately 

If you file your federal income tax return as married filing separately, you must also file as married filing separately with Indiana. Enter both of your Social Security numbers in the boxes on the top of the form, and then check the box directly to the right of those boxes. Enter the name of the person filing the return on the top line, but do not enter the spouse’s name on the second name line.