You can efile an Amended return until mid Oct 2024. After that you can mail it. You have 3 years to file an amended return.
If your first return was efiled and Accepted or you mailed it, then you need to do an Amended tax return to correct and add the new info. You need to wait for the original return to be fully processed and you get the first refund or paid the tax due. Then you can Amend. Be sure to save a copy of your original return before you start the amended return. The Amended return will overwrite the original return.
How to Amend the current year
https://ttlc.intuit.com/turbotax-support/en-us/help-article/tax-return/amend-federal-tax-return-curr...
