Got a letter to complete Tax Return for 22-23 online. I can't find it online

Hello, the story is that I needed to enter the backdated EIS tax relief for years 22-23 and I (mistakenly) applied to be registered for Self-Assessment tax returns. (A day later I also posted the paper form with my EIS certificates, but still got no reply). Probably, as a result of this, I got a letter from HMRC that I need to file online tax returns for 22-23 in 3 months timeframe. I now have UTR number, but I cannot find the 22-23 self-assessment form online. Where to find it, please? Thank you, Sergey

Hi Sergey,
You will need to register for online filing in order to do this - Self Assessment tax returns.
Thank you.