Hi,
The repayment will be from your claim for relief on your pension contributions in your 2022/23 Self Assessment tax return. When claimed on the tax return it will be updated to include it in your tax code going forward 2023/24. The change in the 2023/24 code has then resulted in a refund for this tax year.
The pension relief can only be claimed if the pension contributions come from your net wage. If the pension contributions are deducted from your wage before the tax is calculated then relief already received. If you want to check the code you will need to contact our Self Assessment team.
Self Assessment: general enquiries
Thank you.