Publication 509 has three tax calendars with specific due dates for: Filing tax forms. Paying taxes. Taking other actions required by federal tax law. Current revision Publication 509 PDF (HTML | eBook EPUB) Recent developments None at this time. Other items you may find useful All Publication 509 revisions Other current products Related items About Publication 15, (Circular E), Employer's Tax Guide About Publication 15-A, Employer's Supplemental Tax Guide, (Supplement to Pub. 15, Employer's Tax Guide) About Publication 15-B, Employer's Tax Guide to Fringe Benefits About Publication 51, (Circular A), Agricultural Employer's Tax Guide About Publication 225, Farmer's Tax Guide About Publication 505, Tax Withholding and Estimated Tax About Publication 510, Excise Taxes About Publication 926, Household Employer's Tax Guide
