Missing tax code notice for 22/23

Hello, I don't have my tax code notice for 22/23. My tax code was 0T at that time, but I have no idea if there was any Outstanding debt, is there another way to find out? Or how should I fill the section of self-assessment that's asking about it?

Hi,

If you do not have your last coding notice for 22/23, you can contact us and we can confirm your 22/23 code, and what was present in that code.

Income Tax: general enquiries

Thank you.