Publication 505, Tax Withholding and Estimated Tax - The federal income tax is a pay-as-you-go tax. You must pay the tax as you earn or receive income during the year. There are two ways to pay as you go, withholding and paying estimated tax.
Persons whose gross income from farming or fishing is at least two-thirds of their gross annual income use Form 2210-F, Underpayment of Estimated Tax By Farmers and Fishermen, to see if they owe a penalty for underpaying their estimated tax.
Business Consulting & Taxation, Inc.
11001 W. 120th Ave., Suite. 400
Broomfield, CO 80021-3493 303-690-2030 (office)