They ask to: "Submit evidence to establish that petitioner on form I-130 is a US Citizen".
But I am married to a permanent resident not US Citizen. We filed I-130 and I-485 at the same time when visa category F-2A status was: "Current". I think it was a mistake on the form I-485 Part 2, we check the wrong box (A) instead of (B).
Is it possible to do something to fix the problem? Call to a Customer Service? Or do we now have to re-file again? It's not cheap. I already have biometrics appointment, do I need to go?
Probably best to hire a lawyer to respond and amend. As well, it is Charleston which is a notoriously "angry" field office. Although the leadership there has started to change their thought process, you may end up in a dog fight with them. You should prepare to have a lawyer prepare you for and attend the customary marriage interview when it arrives as well.
See an immigration attorney to understand why they may have sent you that Request for Evidence. It may have been an error by USCIS. In that case, I would answer the Request for evidence and tell them you are married to a permanent resident, and the visa is current. But if the visa is not current (because you filed it concurrently or at the same time), then you should have sent the I-130 first, and there is a possibility you may be eligible for adjustment of status if you have been out of status, unless he is a U.S. citizen. Again, see an immigration attorney for a peace of mind.