You cannot prepare those tax returns using the online program. Online is now closed until it re-opens for 2020 returns.
To file a return for a prior tax year
If you need to prepare a return for 2017, 2018 or 2019 you can purchase and download desktop software to do it, then print, sign, and mail the return(s)
https://turbotax.intuit.com/personal-taxes/past-years-products/
Remember to prepare your state return as well—if you live in a state that has a state income tax.
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.
https://ttlc.intuit.com/questions/1900990-how-do-i-file-a-prior-year-tax-return
Note: Desktop software requires a full PC or Mac—it cannot be installed to a mobile device
If you are getting a refund there is no penalty for filing late. If you owe tax due, your penalties and interest will be calculated by the IRS and they will bill you. TurboTax will not calculate those amounts. Those amounts will be based on how much you owe and when the IRS receives your return and your payment.
**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**
