Confusing wording in "Paying into registered pension schemes and overseas pension schemes"

Box 1 comment says: "Payments to registered pension schemes where basic rate tax relief will be claimed by your pension provider (called ‘relief at source’). Enter the payments and basic rate tax" So do I enter the amount I paid in - or the amount I paid in plus the amount at the basic rate the pension provider would have claimed ? ie what should go in here ?

Hi,

You should enter the gross payment to the pension scheme in box 1. This will extend your basic rate band, reducing the amount you pay tax at 40% on.

Thank you.