The only thing that would be taxable to NY that is not to federal would be box 8 of the interest smart worksheet or box 12 of the smart interest worksheet on Schedule B. You can scroll on the side of the box of the smart worksheet and see the amounts that are tax exempt on your federal return. There you can change the state ID.
The other place you can change the state ID is on the 1099 DIV and 1099-INT themselves. If box 8 on the 1099 INT or box 12 on the 1099 DIV have NY as the state ID it leaves your taxable income for NY. If it has any state other than NY than it is added to line 20 on the NY IT-201. If you make the changes in the box you will see the tax due changes right away and then if you go to the IT-201 line 20 that line will be changed as well.



Vanessa, thanks for the update. I believe I have found the problem but do not understand why it occurred.
In the 1099-DIV Box 12 section (Exempt-interest dividends) at the bottom there is an entry for "where the dividends were earned". For 2024 that box was NY whereas in prior years it was XX. I changed it to XX which caused the state ID in the relevant entry of the Sch. B Dividend Income Smart Worksheet to change from NY to XX and the NY IT-201 line 20 to be correctly updated.
Do you have any idea where that "where the dividends were earned" data comes from?