Taxpayers spouse filed with Turbo Tax HOH

Spouse has 2 children

Taxpayer has 3 children 

No children together

They lived together all of 2023 except December. They are married. They are not legally separated and in NJ there is no legal separation status. 

His refund goes from over $10,000 to $2,000 filing MFS. 

Can she file HOH and him MFS (losing credit)? Does she also have to file MFS?

I want to amend hers and have them file MFJ. 

Her refund HOH was around $8,000.