CH. 66—LIMITATIONS
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provided in subsections (a) and (b)(1), shall not expire prior to 6 months after the expiration of the period within which an assessment may be made pursuant to the agreement or any extension thereof under section 6501(c)(4). (2) LIMIT ON AMOUNT.—If a claim is filed, or a credit or refund is allowed when no claim was filed, after the execution of the agreement and within 6 months after the expiration of the period within which an assessment may be made pursuant to the agreement or any extension thereof, the amount of the credit or refund shall not exceed the portion of the tax paid after the execution of the agreement and before the filing of the claim or the making of the credit or refund, as the case may be, plus the portion of the tax paid within the period which would be applicable under subsection (b)(2) if a claim had been filed on the date the agreement was executed. (3) CLAIMS NOT SUBJECT TO SPECIAL RULE.—This subsection shall not apply in the case of a claim filed, or credit or refund allowed if no claim is filed, either— (A) prior to the execution of the agreement or (B) more than 6 months after the expiration of the period within which an assessment may be made pursuant to the agreement or any extension thereof. (d)
SPECIAL RULES APPLICABLE TO INCOME T A X E S. — (1) SEVEN-YEAR PERIOD OF LIMITATION WITH RESPECT TO BAD
DEBTS AND WORTHLESS SECURITIES.—If the claim for credit or refund relates to an overpayment of tax imposed by subtitle A on account of— (A) The deductibility by the taxpayer, under section 166 or section 832(c), of a debt as a debt which became worthless, or, under section 165(g), of a loss from worthlessness of a security, or (B) The effect that the deductibility of a debt or loss described in subparagraph (A) has on the application to the taxpayer of a carryover, in lieu of the 3-year period of limitation prescribed in subsection (a), the period shall be 7 years from the date prescribed by law for filing the return for the year with respect to which the claim is made. If the claim for credit or refund relates to an overpayment on account of the effect that the deductibility of such a debt or loss has on the application to the taxpayer of a carryback, the period shall be either 7 years from the date prescribed by law for filing the return for the year of the net operating loss which results in such carryback or the period prescribed in paragraph (2) of this subsection, whichever expires the later. In the case of a claim described in this paragraph the amount of the credit or refund may exceed the portion of the tax paid within the period prescribed in subsection (b)(2) or (c), whichever is applicable, to the extent of the amount of the overpayment attributable to the deductibility of items described in this paragraph. (2)
SPECIAL PERIOD OF LIMITATION WITH RESPECT TO NET OPERAT-
ING LOSS CARRYBACKS.—
(A) P E R I O D OF LIMITATION.—If the claim for credit or refund relates to an overpayment attributable to a net operating loss carryback, in lieu of the 3-year period of limitation prescribed in 49012"—54
M
§ 6511(d)(2)(A)
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