3(1)In section 826 of the Taxes Act 1988 (interest on tax overpaid) after subsection (8) there shall be inserted—
“(8A)Where—
(a)interest has been paid to a company under subsection (1)(a) above,
(b)there is a change in the company’s assessed liability to corporation tax, other than a change which in whole or in part corrects an error made by the Board or an officer of the Board, and
(c)as a result only of that change (and, in particular, not as a result of any error in the calculation of the interest), it appears to an officer of the Board that the interest ought not to have been paid, either at all or to any extent,
the interest that ought not to have been paid may be recovered from the company as if it were interest charged under Part IX of the Management Act (interest on overdue tax).
(8B)For the purposes of subsection (8A) above, the cases where there is a change in a company’s assessed liability to corporation tax are those cases where—
(a)an assessment, or an amendment of an assessment, of the amount of corporation tax payable by the company for the accounting period in question is made, or
(b)a determination of that amount is made under paragraph 36 or 37 of Schedule 18 to the Finance Act 1998 (which until superseded by a self-assessment under that Schedule has effect as if it were one),
whether or not any previous assessment or determination has been made.
(8C)In subsection (8A)(b) above “error” includes—
(a)any computational error; and
(b)the allowance of a claim or election which ought not to have been allowed.”
(2)In section 69 of the [1970 c. 9.] Taxes Management Act 1970 (which provides for the recovery of certain interest on tax etc as if it were tax due and payable etc)—
(a)in the words preceding paragraph (a), after “interest charged under Part IX of this Act” there shall be inserted “or recoverable under section 826(8A) of the principal Act as if it were interest so charged”; and
(b)in the words following paragraph (c), after “interest, on tax which is not in fact assessed,” there shall be inserted “or if it is interest recoverable under section 826(8A) of the principal Act,”.
(3)The amendments made by this paragraph have effect in relation to interest on repayments of corporation tax paid for accounting periods ending on or after the day appointed under section 199 of the [1994 c. 9.] Finance Act 1994 for the purposes of Chapter III of Part IV of that Act (corporation tax self-assessment).