! 2013, or if you have an ITIN that

CAUTION haven’t included on a tax return in the

last 3 consecutive years, you may need to re- new it. Form more information, see the Instruc- tions for Form W-7 or go to IRS.gov/ITIN.

Paying estimated tax. Estimated tax is the method used to pay tax (including SE tax) on income not subject to withholding. You generally have to make estimated tax payments if you expect to owe tax, including SE tax, of $1,000 or more when you file your return. Use Form 1040-ES, Estimated Tax for Individuals, to figure and pay the tax.

However, if at least two-thirds of your gross income for the current tax year or the prior tax year is from farming and you file your tax return and pay all the tax due by March 2, you don’t have to pay any estimated tax. For example, if at least two-thirds of your gross income for 2024 or 2025 is from farming and you file your 2025 Form 1040 and pay all the tax due by March 2, 2026, you don’t have to make any estimated tax payments for 2025. For more information about estimated tax for farmers, the definition of “farming income,” and exceptions to what constitutes farming income, see chapter 15.

Penalty for underpayment of estimated tax. You may have to pay a penalty if you don’t pay enough estimated tax by its due date.