I received a check in March 2019 for 401K excess deferral (due to over contribution to the 401k plan). The amount I received was less federal and state tax withholdings. I understand I should report the excess deferral in the 2018 tax return based on other Q&A in this website. How about the federal and state tax that was withheld. Do I include the withheld taxes in the 2018 tax return or in the 2019 tax return?"
