If you retired in 2013, the pension allowance was fixed for you in 2014.
The pension adjustment is the difference between the pension payments from 2013 and 2023. If pensions are adjusted, this usually happens on 1 July of a year.
To determine the pension adjustment for 2023, subtract the pension payments you received in the second pension year from your 2023 pension payments.
Irregular changes in the pension amount, for example because other income was credited to you or this income was temporarily discontinued, are not part of the pension adjustment.