When I was preparing my nonresident GA tax return, my interest income was carrier to GA inappropriately from my Federal return. And the page doesn't allow me to update.

If none of the income belongs to GA, enter the full amount in the ''other state'' box.   TurboTax will transfer all of your income to a non-resident return so you can tell TurboTax which income does not belong there.   You can change the numbers on the interview screen.

 

See example below - There was $31,935 of gains and losses on the federal return but only $5K was GA sourced.   You would edit both fields.   If you look at the GA Income and Retirement Worksheet, you see only the GA amount reported on the GA return.