Online is only good for the current year. For prior years you need to buy the Desktop program for each year. They only sell the last 3 years. You have to file each year separately. Or go to a local tax place. Or if you have a simple return you can get the blank forms and fill them out by hand. I have the IRS links to most of the years.
How to prepare a prior year return
https://ttlc.intuit.com/community/using-turbotax/help/how-do-i-prepare-a-prior-year-tax-return/00/25...
To do a prior year return you have to buy the Desktop program here,
https://turbotax.intuit.com/personal-taxes/past-years-products
You will need a full Windows or Mac to install it on.
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.
If you have a simple return and want to file for free you can fill out the forms by hand. Here are some basic forms…..
2024
Here is the IRS 2024 Form 1040
https://www.irs.gov/pub/irs-prior/f1040--2024.pdf
or if you want bigger type use 1040SR for Seniors,
https://www.irs.gov/pub/irs-prior/f1040s--2024.pdf
And 2024 Instructions
https://www.irs.gov/pub/irs-prior/i1040gi--2024.pdf
Sch 1 : https://www.irs.gov/pub/irs-prior/f1040s1--2024.pdf
Sch 2 : https://www.irs.gov/pub/irs-prior/f1040s2--2024.pdf
Sch 3 : https://www.irs.gov/pub/irs-prior/f1040s3--2024.pdf
Then when you do file 2025 enter 0 for the 2024 AGI since you are filing 2024 late.
2023
Here is the IRS 2023 Form 1040
https://www.irs.gov/pub/irs-prior/f1040--2023.pdf
or if you want bigger type use 1040SR for Seniors,
https://www.irs.gov/pub/irs-prior/f1040s--2023.pdf
And 2023 Instructions
https://www.irs.gov/pub/irs-prior/i1040gi--2023.pdf
2023 Tax and EIC Tables
https://www.irs.gov/pub/irs-prior/i1040tt--2023.pdf
Sch 1 : https://www.irs.gov/pub/irs-prior/f1040s1--2023.pdf
Sch 2 : https://www.irs.gov/pub/irs-prior/f1040s2--2023.pdf
Sch 3 : https://www.irs.gov/pub/irs-prior/f1040s3--2023.pdf
