I'm so upset my IRA provider was bought out by Betterment, because yikes this has been a hassle and a half.
I have the same situation of having deposited and withdrawn Roth IRA excess, and they put the same amount in 1 and 2a, then checked 2b.
Their solution was first to tell me to use form 8606, then:
"If you are withdrawing excess contributions, you have to use a similar process as the 8606 (but outside of the 8606), determining your taxable vs tax free portion of your distribution which will end up on the 1040 itself."
