Interest on Underpayment of Estimated Income Tax
Rule 06d .0201 - GeneralRule 06d .0202 - the Amount of Underpayment (taxable Years Before 1986)Rule 06d .0203 - the Period of Underpayment (taxable Years Before L986)Rule 06d .0204 - Avoiding Penalty (taxable Years Before 1986)Rule 06d .0205 - Estimated Tax Payments (taxable Years After 1986)Rule 06d .0206 - Avoiding PenaltyRule 06d .0207 - UnderpaymentsRule 06d .0208 - OverpaymentsRule 06d .0209 - Determining an UnderpaymentRule 06d .0210 - Period of UnderpaymentRule 06d .0211 - Farmers and Fishermen