If you are a farmer or fisherman, the following special rules for underpayment of estimated tax apply to you.

1. The penalty for underpaying your 2000 estimated tax will not apply if you file your return and pay all the tax due by March 1, 2001. If you are a fiscal year taxpayer, the penalty will not apply if you file your return and pay the tax due by the first day of the third month after the end of your tax year.
2. Any penalty you owe for underpaying your 2000 estimated tax will be figured from one payment due date, January 15, 2001.
3. The underpayment penalty for 2000 is figured on the difference between the amount of 2000 withholding plus estimated tax paid by the due date and the smaller of:
   1. 100% of the tax shown on your 1999 return, or
   2. 66 2/3% (rather than 90%) of your 2000 tax.

Even if these special rules apply to you, you will not owe the penalty if you meet either of the two conditions discussed earlier under Exceptions.

See chapter 2 to see whether you are a farmer or fisherman who is eligible for these special rules.

Form 2210-F. Use Form 2210-F to figure any underpayment penalty. Do not attach it to your return unless you check box 1a or box 1b. Also, if neither box applies to you and you owe a penalty, you do not need to complete Form 2210-F. The IRS can figure your penalty and send you a bill.

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