ymf

Hi, I registered Self Assessment for the tax year 6 April 2023 to 5 April 2024 and received a UTR number. Meanwhile, I received letters from HMRC informing me to complete a Self Assessment tax return for the tax year 2021-2022 and year 2022-2023 within 3 months. May I know how I could complete the tax return online (i.e. tax year 2021-2022 and 2022-2023)? I am not able to find the link when I login to my gateway profile. Where can I get that? Thank you.