- This event has passed.
IMPORTANT DEADLINE: Individuals
Make a payment of your estimated tax for 2018 if you didn’t pay your income tax for the year through withholding (or didn’t pay in enough tax that way). Use Form 1040-ES. This is the final installment date for 2018 estimated tax payments. However, you don’t have to make this payment if you file your 2018 return (Form 1040) and pay any tax due by January 31, 2019.