Hi M8 SN,
Contact us by webchat or phone here:
Income Tax: general enquiries- We can then confirm if any overpayment is due for the years specified, and issue this out to you if you are unable to claim online.
For problems with verifying your identity, your log in details or receiving access codes, click on the ‘Get help’ or ‘Is there anything wrong with this page’ link at the bottom of the page in the online service you’re using, or contact our Online Services here:
Technical support with HMRC online services
Thank you.