You can amend if your review has been accepted, but it is best to wait until your original return has been processed and you have received your refund or paid your tax due. You will need to prepare an amended tax return on a
1040X and mail it in. You cannot e-file
an amended return. They have to be mailed, and it takes up to 16 weeks for the IRS to process an
amended return. 3 weeks after you mailed your amendment, you can start
tracking its progress at the IRS Where's
My Amended Return? site.
Amendment instructions can be found
here: https://ttlc.intuit.com/replies/6602873
Do I need to amend: https://ttlc.intuit.com/replies/3318732