Fiscal Year Taxpayers

If you use a fiscal year (rather than the calendar year) as your tax year, you should change some of the dates in this calendar. Use the following general guidelines to make these changes.

The 3 months that make up each quarter of a fiscal year may be different from those of each calendar quarter, depending on when the fiscal year begins. Also see Saturday, Sunday, or legal holiday.

Individuals

Form 1040. This form is due on the 15th day of the 4th month after the end of your tax year.

Estimated tax payments (Form 1040-ES). Payments are due on the 15th day of the 4th, 6th, and 9th months of your tax year and on the 15th day of the 1st month after your tax year ends.

Partnerships

Form 1065. This form is due on the 15th day of the 3rd month after the end of the partnership's tax year. Provide each partner with a copy of Schedule K-1 (Form 1065) or a substitute Schedule K-1.

Form 1065-B (electing large partnerships). This form is due on the 15th day of the 3rd month after the end of the partnership's tax year. Provide each partner with a copy of Schedule K-1 (Form 1065-B) or a substitute Schedule K-1 by the first March 15 following the close of the partnership's tax year.

Corporations

Form 1120. These forms are due on the 15th day of the 4th month after the end of the corporation's tax year.

S Corporations

Form 1120S (or Form 7004). These forms are due on the 15th day of the 3rd month after the end of the corporation's tax year. S corporations must provide each shareholder with a copy of Schedule K-1 (Form 1120S) or a substitute Schedule K-1.

Estimated tax payments. Payments are due on the 15th day of the 3rd(S Corporations), 4th (for Corporations), 6th, 9th, and 12th months of the corporation's tax year.

Form 2553. This form is used to choose S corporation treatment. It is due no more than two months and 15 days after the beginning of the tax year the election is to take effect or at any time during the preceding tax year.

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Upcoming Tax Dates

October 9 — Everyone
Federal Holiday (Columbus Day) - Details

October 11 — Employees who work for tips
If you received $20 or more in tips during September, report them to your employer - Details

October 15 — Individuals
If you have an automatic 6-month extension to file your income tax return for 2017, file Form 1040, 1040A, or 1040EZ and pay any tax, interest, and penalties due - Details

October 15 — Corporations
File a 2017 calendar year income tax return (Form 1120) and pay any tax, interest, and penalties due. This due date applies only if you timely requested an automatic 6-month extension Details

October 15 — Partnerships
Electing large partnerships: File a 2017 calendar year return (Form 1065-B). This due date applies only if you were given an additional 6-month extension - Details

October 15 — Social security, Medicare, and withheld income tax
If the monthly deposit rule applies, deposit the tax for payments in September.

October 31 — Certain small employers
Deposit any undeposited tax if your tax liability is $2,500 or more for 2017 but less than $2,500 for the third quarter.

October 31 — Federal unemployment tax
Deposit the tax owed through 09-if more than $500.

October 31 — Social security, Medicare, and withheld income tax.
File Form 941 for the third quarter of 2018. Deposit or pay any undeposited tax under the accuracy of deposit rules .If your tax liability is less than $2,500, you can pay it in full with a timely filed return. If you deposited the tax for the quarter timely, properly, and in full, you have until 11-10 to file the return.

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