DanielV01
Expert Alumni

Get your taxes done using TurboTax

@chloengle  I'm sorry.  I was away a couple of days.  You wouldn't be allowed to file jointly in 2018 if you married Jan. 1.  The Marriage Certificate provided by your city might have had a 2018 date because you obtained it prior to the wedding, but it's not official until the official presiding the ceremony signs, which he/she wouldn't have done until the wedding on January 1.
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