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.
