Tax Refund and Tax Debt

I have not had access to the HMRC app and just did today. I discovered I have a refund for 2022/2023 tax year but I did not receive any mail and I have changed addresses. I have updated my new address today via the app. 1. How do I get access to this refund? 2 Can this refund be used to defray indebtedness for 2023/2024 tax year? Thanks.

Hi,
If you have not received the refund then you will need to contact our Income Tax team to review. When you contact us we can check if the underpayment can be set against any underpayment for the 2023 to 2024 tax year.
Income Tax: general enquiries
Thank you.