As a member of the military, not all of your pay and benefits are subject to tax.
Military members and their families don't pay tax on living allowances, the value of provided quarters, dependent care assistance programs, or combat pay, among other things.
You may also have more time to file as a member of the military.
If you or your spouse is on duty outside the U.S. or in Puerto Rico, you have an extra two months to file - without even filing for an extension. You can still get an additional four months to file if you file for an extension via Form 4868. If you are in a combat zone, you receive even more extra time to file - generally your return is due 180 days after your last day in a combat zone or your last day in a hospital for injuries sustained in a combat zone.
March 1 — Farmers & fishermen
File your 2018 income tax return (Form 1040) and pay any tax due Details
March 10 — Employees who work for tips
If you received $20 or more in tips during February, report them to your employer Details
March 15 — S Corporations
File a 2018 calendar year income tax return (Form 1120S) and pay any tax due Details
March 15 — S Corporation election
File Form 2553, Election by a Small Business Corporation, to elect to be treated as an S corporation beginning with calendar year 2018. If Form 2553 is filed late, S corporation treatment will begin with calendar year 2019.
March 15 — Partnerships
File a 2018 calendar year return (Form 1065) Details
March 15 — Electing larger partnerships
Provide each partner with a copy of Schedule K1 (Form 1065B), Partner's Share of Income (Loss) From an Electing Large Partnership, or a substitute Schedule K1. This due date applies even if the partnership requests an extension of time to file the Form 1065B by filing Form 7004
March 15 — Partnerships
Electing large partnerships: File a 2018 calendar year return (Form 1065-B) Details
March 15 — Social security, Medicare, and withheld income tax
If the monthly deposit rule Page 6 Publication 509 applies, deposit the tax for payments in February.
March 31 — Electronic filing of Forms W2
File copies of all the Forms W2 you issued for 2018. This due date applies only if you electronically file.
March 31 — Electronic filing of Forms W2G
File copies of all the Forms W2G you issued for 2018. This due date applies only if you electronically file.
March 31 — Electronic filing of Forms 8027
File Forms 8027 for 2018. This due date applies only if you electronically file.