Hi,
As the return for 2021 to 2022 is already late, you will have been charge late filing penalties. Once the return is submitted and if there is any tax to pay, you will be charged penalties for late payment and also interest for late payment as this should all have been done by 31 January 2023.
Self Assessment tax returns
Your income for 2021 to 2022 should be filed separately from 2022 to 2023.
Thank you.