Sorry, Online is only for 2023 now. Online for 2022 and prior is closed now so you can not start a new 2021 or prior return or finish one. You have to do each year separately
How to prepare a prior year return
https://ttlc.intuit.com/community/using-turbotax/help/how-do-i-prepare-a-prior-year-tax-return/00/25984
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.
Important! Mail Federal and State in separate envelopes and mail each year in separate envelopes.
if your 2020 return was not on extension you forfeited any refund by not filing timely. If on extension. you have until 10/15/2024. if you owe there is no time limit for the IRS to collect. any year prior to 2023 and after 2019 can only be prepared using a Turbotax Desktop App. they can't be e-filed. each year is a separate purchase, full pc or mac
https://turbotax.intuit.com/personal-taxes/past-years-products
you may want to check the IRS website. perhaps free file is available for the open years.
https://www.irs.gov/filing/free-file-do-your-federal-taxes-for-free
So the IRS has sent me transcripts from 2020 and 2021, they stated that i do not owe anything but i am needed to file for those years by may,30,2024.
in my turbo tax i have returns from 2020 and 2021 that look somewhat different from the transcripts that were sent to me.
my 2021 return was rejected by federal
my 2020 return was originally send to federal but not received . I am not sure if i should go off of the trascripts to resend to the IRS or just download my previous returns and send those into the IRS