by Incredulum on Wed Nov 16, 2011 4:11 pm
Hello Maths!
Because it is the accounts that are wrong rather than the tax return*. The accounts failed to accrue correctly for the expenditure in the appropriate year, so it is appropriate to book the deduction in the accounts for the subsequent year. And hence the tax follows accounts prepared under GAAP.
I agree it is possible to resubmit the accounts and tax return for the earlier year, but there is no tax advantage to so doing. If it were a company that had failed to accrue the expenditure in the accounts filed at Companies House you would not be suggesting that the filed accounts should be re-filed, I think.
So it's an accounting question, really. And the question is "are the accounts prepared under GAAP?" And given the value of a house, is failure to report replacement of a hot water cylinder likely to show accounts that are materially incorrect? I don't think so, hence it is appropriate to address in the following year.
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* The tax return is obviously incorrect if the accounts are "incorrect". But the tax return is based on accounting profit.