Hi,
If the pension contributions are deducted from your gross pay before the tax is calculated then you have already received the tax relief for these payments and would not be able to claim the relief again.
Your HICBC would be based on your P60 figures.
Yes, you have done the correct thing and the calcullations would be correct. If you want to check the calculations then you will need to contact our Self Assessment team to access your record.
Self Assessment: general enquiries
Thank you.