Did you finish the 2023 return? You can just print it out and mail it now. Make sure the $600 is entered on schedule 3 line 10 which goes to 1040 line 31.
Or to finish using the Desktop program, How to finish a return you started online
https://ttlc.intuit.com/community/prior-year-return/help/how-do-i-finish-a-prior-year-return-that-i-...
If you can't get the side menus to open up to access the prior year..... You need to start entering some basic Personal Info in 2024 for the side menu to open up. Just continue a little ways into 2024.
