If you're signing in for the first time you’ll need a Government Gateway account and a permanent National Insurance number. Once you have signed in, you will automatically activate your Personal Tax Account.
This means you will be able to check your records and manage your details with HMRC. This includes checking and managing your tax credits as well as tracking any forms that you’ve submitted online.
What you need:
your renewal pack - if you don’t get your renewal pack by 21 June 2019, Contact HMRC
your National Insurance number
details about any changes to your circumstances
you and your partner’s total income for the last tax year
Further guidance on renewing your tax credits can be found on GOV.UK via the link below: