I represent a husband filing MFS in California (a community property state). He doesn't have his wife's information and wants to just file how he has in the past which is just to include his total income on the 1040 and nothing allocated from his wife. They are both in the same tax bracket.
In the past neither has filed Form 8958.
How to deal with this if he is adamant about filing MFS with just his income?
Essentially the tax liability between the two of them is the same, it's just not being allocated correctly between the two of them.