Pay your estimated tax for 2018 using Form 1040-ES. You have until April 15 to file your 2018 income tax return (Form 1040). If you do not pay your estimated tax by January 15, you must file your 2018 return and pay any tax due by March 1, 2019, to avoid an estimated tax penalty.
File your 2018 income tax return (Form 1040) and pay any tax due. However, you have until April 15 to file if you paid your 2018 estimated tax by January 15, 2019.
May 10 — Employees who work for tips
If you received $20 or more in tips during April, report them to your employer Details
May 10 — Social security, Medicare, and withheld income tax
File Form 941 for the first quarter of 2019. This due date applies only if you deposited the tax for the quarter timely, properly, and in full.
May 15 — Social security, Medicare, and withheld income tax
If the monthly deposit rule applies, deposit the tax for payments in April.
May 27 — Everyone
Federal Holiday (Memorial Day) Details