12After paragraph 7 there shall be inserted—
“Amended return where company becomes aware of an error
7A(1)If a company becomes aware—
(a)that anything which ought to have been included in a return made by it under this Schedule for any period has not been so included,
(b)that anything which ought not to have been included in a return made by it under this Schedule for any period has been so included, or
(c)that any other error has occurred in a return made by it under this Schedule for any period,
it shall forthwith supply to the collector an amended return for that period.
(2)The duty imposed by sub-paragraph (1) above is without prejudice to any duty that may also arise under paragraph 7A of Schedule 13.
(3)Where an amended return is supplied under this paragraph, all such assessments, adjustments, set-offs or payments or repayments of tax shall be made as may be required for securing that the resulting liabilities to tax (including interest on unpaid or overpaid tax) whether of the company or any other person are the same as they would have been if a correct return had been made.”