How does this claim affect my tax code?
As part of the claim process your tax code is changed by HM Revenue & Customs. This change increases your tax free allowance so in the future you will not be taxed on your unions subscriptions and professional fees.
You will be notified once your tax code has been amended by HMRC. As soon as your tax free allowance has been increased the Tax Office will issue you with a "P2 Coding Notice" which contains your new tax code.