You don't "upload" it ... you OPEN it.
How to amend (change or correct) a return you already filed
You can amend e-filed returns if they've been accepted; paper-filed returns may be amended once they've been mailed.
If your e-file is still pending, you won't be able to make changes until the IRS either accepts or rejects it. Don't know your e-file status? Here's how to look it up.
Select your tax year for amending instructions:
