Turbo Tax won't figure the interest and penalties. Let the IRS bill you for those. You have to print and mail amended returns. Mail each one in a separate envelope. It will take the IRS a long time to process them, like 6 months or more.
You may have trouble amending 2019. Turbo Tax only supports the last 3 years and stopped 2019. Do you still have it installed? You won't be able to reinstall 2019 now or update it.
To amend in Windows,
You start by just opening your return as usual. Go up to File-Open. You need to have the .tax2019, etc. file on your computer.
Also you first need to check the filing status inside the program so it knows it was filed and accepted. Open your return and go up to the top black menu bar first item
File > Electronic Filing > Check Electronic Filing Status
Then save your return and close it. Close the program and reopen it.
If you don't see a button for Need to Amend a Filed Return? on your home screen then you can get to it here. Go to:
Federal Taxes -or- Personal (for H&B)
Other Tax Situations
last section, Other Tax Forms
Amend A Return - Click the Start or Update button
