Hi Nandi-Mihail Artene,
If you are still self employed and part of the CIS scheme, please contact the Self Assessment helpline, to ensure your records are stil live.
If you have overpaid CIS deductions, then you will need to submit a Self Assessment tax return and and record the CIS deductions.
You will also confirm with your gross turnover and expenses on the self employment section (SA103S) along with the main tax return SA100.
Self Assessment: general enquiries