Around 1.5 million tax credits renewal packs for the 2023-24 tax year will be issued to people from tomorrow.
The annual renewal packs will be sent out between May 2 and June 15. Tax credits help families with targeted financial support.
More than 500,000 tax credits customers will need to reply to HMRC by a deadline to confirm their circumstances for the 2023-24 tax year, or they could risk having their payments stopped.