My gf amended her return to remove our daughter but when I claimed her my return was rejected why

[Irene2805]

Amended returns take a while to process and even longer for the information to hit the IRS computer.  Meanwhile, the IRS computer has already received a return with your daughter's SSN on it this year.   Print and mail in your return with an explanation that your girlfriend amended her return to remove the daughter as a dependent.

[xmasbaby0]

If the child's SSN has already been used on a tax return for 2019 then your GF's amended return will not catch up in the system this year.  If you are claiming the child then the only way for you to file is to print, sign and mail your own return.

When you mail a tax return, you need to attach any documents showing tax withheld, such as your W-2’s or any 1099’s.  Use a mailing service that will track it, such as UPS or certified mail so you will know the IRS/state received the return.