Hi andryha123,
Yes if you are a higher rate taxpayer and the pension contributions are from your net wage then you can claim the additional relief on your Self Assessment tax return.
When you submit your Self Assessment you will receive a calculation SA302. If you want to query the SA302 if you allow 3 working days for the submitted tax return to process to HMRC records and then contact us we can review.
Self Assessment: general enquiries.
Thank you.