I filed 2018 taxes as single and now my ex husband is saying that in order for his accountant to complete his taxes he must have a copy of mine is this true? And why?

[xmasbaby0]

Were you divorced by the end of 2018?  If you were not divorced then you could not file "Single" for 2018--your filing choices would be married filing separately or married filing jointly.  If you were divorced by the end of 2018, then "Single" or possibly "Head of Household" would be the correct filing status for you.  If you were Single or HOH for 2018, your ex has no right to see your tax return.  If you should have filed as MFS, then there are rules for that filing status that you have to follow.  When you file MFS then both people have to itemize, or both have to use standard deduction.

[DoninGA]

If you are not legally married in 2018, I see no reason why you would be obligated to provide any type of tax data to your ex for them to complete their tax return.  Was there something specific that is being asked by the accountant?

[Anonymous]

bad previous answer.      since you are divorced at 12/31/2018 and filing single. there would only be two things of interest to your ex's accountant.  If you had joint income such as from dividends or interest, how did you report them if at all.     the same question arises  as to joint itemized deductions such as mortgage interest and taxes, if you itemized.     I would tell your ex to have his accountant prepare a list of questions.

the questions should be restricted to details of any joint income you reported - source and amount.  if you didn't itemize that's all you need to say.    having said all this, there's no requirement to answer the questions unless there was something in the divorce decree about each providing tax info to the other.