Work out your tax code
When you have a special tax code
If you already have a special tax code or deduction rate (IR23) certificate, your tax code will be STC.
Write STC in the circle under question 2 of the Tax code declaration (IR330) form, then give the completed form to your employer. Make sure you complete questions 1-4 of the IR330. You?ll need to attach a copy of the IR23 to the IR330.
You can download an IR330 here or complete it online - go to "Forms and guides".
Find out more about special tax codes.
Note
We've provided this decision tree to help you work out your tax code. We welcome your feedback on how useful you found it.
Date published: 01 Jul 2008
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