The Income Tax year in Ireland is from 01 January to 31 December.
Generally, Income Tax Returns are filed on or before 31 October in the year following the tax year (or later date allowed if filed online).
For the tax year ended 31 December 2020, your Return of Income is due on 31 October 2021. It is advisable to prepare your Return of Income well before this date.
Why? Well if you are due a Refund of Tax, it is better to get it as soon as possible. If you owe tax, it is better to know how much that is so that you can plan for the payment in October.
You should also make sure that you have claimed all available credits and allowances and have your pension planning review if necessary.
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