Congratulations, you’re married now! You can file a joint tax return with your spouse as long as you were married on or before December 31 of the tax year for which you’re filing a return. For example, If you got married on December 1, 2017, you can file a joint return with your spouse and use the filing status married filing jointly on your 2017 tax return. However, if you marry on Valentine’s Day of 2018, you and your spouse were not married on the last day of 2017 and won’t be eligible to file a joint return for the tax year of 2017.
You can use this link to select your filing status if you need to change it before submitting your return. If you’ve already submitted your tax return with a single filing status, and the IRS accepted it, you’ll need to file an amended return to change your filing status to reflect your marriage.