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10 | Employees Who Work for Tips – If you received $20 or more in tips during August, report them to your employer. You can use Form 4070. |
16 | Employers – Social security, Medicare, and withheld income tax. If the monthly deposit rule applies, deposit the tax for payments made in August. |
16 | Employers – Nonpayroll withholding. If the monthly deposit rule applies, deposit the tax for payments made in August. |
16 | Individuals – Make a payment of your 2019 estimated tax if you’re not paying your income tax for the year through withholding (or won\’t pay in enough tax that way). This is the third installment date for estimated tax in 2019. |
16 | Partnerships – File a 2018 calendar year return (Form 1065). Provide each partner with a copy of their Schedule K-1 (Form 1065), Partner\’s Share of Income, Deductions, Credits, etc., or substitute Schedule K-1 (Form 1065). To request an automatic 6-month extension of time to file the return, Form 7004 needs to be filed. After the return is filed, provide each partner with a copy of their final or amended (if required) Schedule K-1 (Form 1065) by September 16. |
16 | S Corporations – File a 2018 calendar year income tax return (Form 1120S) and pay any tax, interest, and penalties due. This due date applies only if you timely requested an automatic 6-month extension of time to file the return. Otherwise, see March 15, earlier. Provide each shareholder with a copy of their final or amended Schedule K-1 (Form 1120S) or substitute Schedule K-1 (Form 1120S). |
16 | Corporations – Deposit the third installment of estimated income tax for 2019. A worksheet, Form 1120-W, is available to help you estimate your tax for the year. |