Single mother with one daughter.  Daughter got married on July 5th, but husband is in the service so the daughter remained living with her mom until the end of September and her husband was finally stationed in one area.   Can the mother claim the child under head of household  but possibly not take the exemption?   If so can the daughter file jointly with her husband? or should he file married filing separately?  The part confusing me is that the child was not married for the first 6 months and 4 days, and also remained under the mom's care until the end of September.