The packs will be sent out until 27 May, and claimants have until 31 July to check their details are correct, or update HM Revenue and Customs (HMRC) if there are any change of circumstances.

This could include a change in living arrangements, childcare, working hours or income (increase or decrease).

Tax credits help working families with financial support, so HMRC said it is important people don’t miss out on money they are entitled to.

There are two types of renewal packs:

• If it has a red line across the first page and says ‘reply now’, customers will need to confirm their circumstances to renew their tax credits.
• If it has a black line across the first page and says ‘check now’, customers will need to check their details are correct. If correct, customers do not need to do anything and their tax credits will be automatically renewed.

HMRC said about 630,000 claimants will need to confirm their circumstances to renew their tax credits for the 2022/23 tax year.

Tax credits can be renewed online via Gov.uk or via the HMRC app.

Tax credits are ending and will be replaced by Universal Credit by the end of 2024. You can use an independent benefits calculator to check if you’ll be better by switching to Universal Credit, though it’s important to get independent advice before the move.