The second one should had been rejected due to 2 returns with same social securities numbers.
You should had got an email from whichever company processed the second one stating "rejected".
So, yes...when they process the second one it will be flagged that the number(s) have already been used.
Then they'll reject it.
If it had been from the portal for non-filers you wouldn't have to amend cuz the company is who rejects it. The IRS doesn't know about it.
I don't know how the IRS will deal with the paper one.
I agree with the CPAs,, let them tell you that it has to be amended.
I'm not positive it will have to be.
