<prompt> Human: Sorry for the ignorance, but this is my first time going through the U.S. tax system since moving here.Im doing my personal taxes with my accountant. Im filing as married filing separately. My accountant asked me for my wifes DOB and SSN, is this normal? Does he really need her SSN to file my taxes?Just wanted to clarify, Thanks PF  <response>: Yes, her SSN is needed for you to file MFS on line 3 of the 1040 