No, you cannot use a previous year's student loan interest on your 2024 tax return. You can, however, amend the return for the tax year in which you forgot to enter the interest. Only student loan interest that you paid in 2024 can be entered on a 2024 tax return.
https://ttlc.intuit.com/turbotax-support/en-us/help-article/tax-return/amend-change-correct-return-a...
Do not expect quick results from amending. It can take four months or more for the IRS to process an amended return.
You can watch for information here:
https://www.irs.gov/Filing/Individuals/Amended-Returns-(Form-1040-X)/Wheres-My-Amended-Return-1
You can navigate back to the federal return to make a correction if you need to. Use the tool bar on the side of your TT screen to return to Federal. Unless you are entering something that is not supported by the version of the software you are currently using, there is no upgrade needed to make a correction. We cannot tell from your post whether you are using online TurboTax or desktop download. What are you trying to correct in federal?
**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**
