Hi Rustem,
If you received an end-of-year tax refund before you filed a tax return for the same year, enter the amount you received on the page titled 'Tax Refunded or Set Off', in the box 'Income Tax refunded or set off'.
Please note, if you you received your refund during that tax year, through your wage, you do not need to complete this box.
For more advice, contact us by webchat or phone here:
Self Assessment: general enquiries.
Thank you.