Hi-

I have a new client that was recently married in 11/2023.  His wife filed her return separately as HOH through H&R Block.  I told him that they needed to file MFJ or MFS.  Now I have a problem with his returns.  My question is how would I amend the wife HOH to MFJ? Can it be done? or do I have to amend her return to MFS? Is it possible to eventually get them to MFJ for 2023?  He made a lot of money and they just bought a house so he will lose those deductions. They also have 4 children between them.

Thank you in advance for your help.