Married couple filing income tax,one filed jointly-unknowingly that the other had filed married single?

what do i need to do? This happened from lack of communication. I have always handled tax papers but this year spouse decided to file separately with not a word to me. I made sure the returns were filed before the deadline. I need to know if I need to contact IRS or jut wait until they contact me. Thanks for any help anyone can give me.....