You will have to amend your return and file it correctly. You either file Married Filing Jointly if you and your spouse are living together or you file as Head of Household claiming only your kids and your spouse files a Married Filing Separately tax return if you lived apart for the last 6 months or more of the year.
Here is how to amend a tax return: https://ttlc.intuit.com/questions/1894381-how-to-amend-change-or-correct-a-return-you-already-filed Don't change your original return until you start the amended return.
Amended tax returns must be printed and mailed by you. They can't be efiled. In normal times an amended return takes 16 weeks to process.
