If you have income from farming, you may be able to avoid making estimated tax payments by filing your return and paying the entire tax due on or before March 1 of the year your return is due. If March 1 falls on a weekend or legal holiday, you have until the next business day to file and pay tax. This estimated tax rule generally applies if at least 2/3 of your total gross income is from farming during the tax year or previous tax year. Refer to Chapter 2 in Publication 505 , Tax Withholding and Estimated Taxes and Tax Topic 416, Farming and Fishing Income, for additional information.