I didn't realize that I was supposed to file a nonresident Idaho state tax return and now know that I need to fix that for this year and last year. What do I do?

[KatrinaB · Accepted solution]

You will need to amend your state return for 2017 and 2018 in order to add a nonresident state. Please follow the directions in the TurboTax FAQ below.

https://ttlc.intuit.com/replies/4653469

Note: You are required to mail your amended state returns. An amended or prior year return is not eligible for e-file.