Computation

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A pension contribution made in the following tax year is brought back to the current tax year but no deduction appears in the computation. Why?

 

Why are the trading losses not appearing as deductions on the computation?

 

Where does such and such an amount come from?

 

The trade has ceased but the trade computation does not reflect this. Why?

 

The profits are far lower than expected because of an overlong basis period. Why is it so long?