Apply for an increase in tax credits for a backdated disability benefit decision

If you have received a backdated disability benefit decision for a period when you were claiming tax credits, you can ask HMRC to pay you extra tax credits for that period.

You must submit your application within one month of being told either:

Read Tax credits disability helpsheet TC956 to find out all the conditions you need to meet to get the tax credits payment.

Tell HMRC about a backdated disability benefit decision for an adult

Use this form to tell HMRC about a backdated decision for Working Tax Credit.

This file may not be suitable for users of assistive technology.

Tell HMRC about a backdated disability benefit decision for a child

Use this form to tell HMRC about a backdated decision for Child Tax Credit.

This file may not be suitable for users of assistive technology.

These files may not be suitable if you use assistive technology (such as a screen reader). If you need a more accessible format, email [email protected] and tell us what format you need. It will help if you tell us what assistive technology you use. Read the accessibility statement for HMRC forms.

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You could be fined up to £3,000 if you give wrong information.