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Calculating Your Tax Position
If the Inland Revenue send you a Tax Return to complete you will also be sent a Tax Calculation Guide. The basic version of the guide runs to 16 pages with the comprehensive version (for those with complicated tax affairs) a staggering 34 pages long!
However, provided that your Tax Return is sent to the Inland Revenue by the 30th September, following the end of the tax year, they will calculate your tax position. This deadline is extended to 31st December following the end of the tax year if you are filing online. If both deadlines are missed then you must complete both the Tax Return and the calculation and return them to the Inland Revenue by the 31st January deadline. Any tax outstanding must also be paid by this date.