In your reply you indicated I have to buy the desktop version to files taxes for 2023 - however, the current online version allows me to file for prior years - what can I not use that option ?
AND You have to print and mail prior year returns. When you mail a tax return, you need to attach any documents showing tax withheld, such as your W-2’s or any 1099’s. Use a mailing service that will track it, such as UPS or certified mail so you will know the IRS received the return. Don’t forget state.
Then when you do file 2024 enter 0 for the 2023 AGI since you are filing 2023 late.