If you already filed your tax return you cannot redo it. You will first have to wait to see if your tax return is accepted or rejected. That probably won't happen until after February 12, when the IRS is scheduled to start processing 2020 tax returns. If it's rejected you can add the missing form when you correct the reason for the rejection, and resubmit the tax return.
If your tax return is accepted, you will then have to wait until the IRS finishes processing it and you get your refund. Then you will have to file an amended return, Form 1040-X, to add the missing form. Here is a link to the instructions for filing a 2020 amended return in TurboTax Online.
My refund was rejected because I need to add my health insurance but I can’t seem to fix it what do I do
To enter your Form 1095-A -
- Click on Federal Taxes (Personal using Home and Business)
- Click on Deductions and Credits
- Click on I'll choose what I work on (if shown)
- Scroll down to Medical
- On Affordable Care Act (Form 1095-A), click the start or update button
Or enter 1095-a in the Search box located in the upper right of the program screen. Click on Jump to 1095-a