Hi,
You can file a Self Assessment tax return up until 31 January 2025 for the 2023 to 2024 tax year and you can file early if you have completed a full year after 06 Aril 2024 through Self Assessment and it would be back dated if any class 2 payment was received before you reach State Pension age.
If the tax year was not a full self employed year you can file early as a short return.
Once you have filed a return for the 2023 to 2024 tax year please contact the National Insurance team two working days later to discuss the tax year and confirm that it is your final relevant year for pension purposes so we can check the return and advise on any payments to be made.
National Insurance: general enquiries
Thank you.