My return was rejected, it says I can amend it but I can figure out how to do that, I need to add a 1095~A form, Thank you

If your return was rejected, you do not want to amend it. Instead, you need to click on Fix my return and then re-file it. You only amend a return if it has been accepted and you need to change something on it. If it was rejected, it has not yet been accepted. 

If you are getting rejected with an error code of F8962-070 it is because the IRS believes that you or someone on your return received health insurance through the marketplace in 2021. This may be the case if anyone is listed as a covered individual on a marketplace insurance policy, even if the main individual is not on your tax return. Someone may be on the insurance plan of an ex-spouse, a former partner if they have a child together, or on their parent's insurance if they are under 26. 

If anyone in your family has an account on Healthcare.gov, they will want to check to verify there is no 1095-A for 2021. If no one in your family was covered by marketplace insurance at any point in 2021, this has worked for some:

1. Click Deductions and Credits
2. Scroll down to Medical and Click Show More
3. Click Start or Revisit next to the Affordable Care Act
4. As you walk through the questions, you will be asked if you received a 1095-A.  If you did NOT, click YES.
5. Enter your 2 letter state code for the Marketplace identifier and 0's as the Policy number.
6. Enter $1 for January monthly premium amount and SLCSP. Enter 0 for the Monthly Advance Payment of Premium Tax Credit for January.
7. Continue to the end and submit your return. 

Entering $1 for your January premium will not impact your return and it should get past the IRS automatically rejecting it for not having the marketplace forms attached to your return. However, if Form 1095-A was issued for yourself or a member of your family, filing without the real form will cause a delay and possibly an automatic change to your tax refund by the IRS.