Can we back pay into pension to reduce tax?

For SAYE 22-23, pension is salary sacrificed. Yet outcome was still a higher rate tax payer over by say £2000. Can we make an additional pension payment from bank account to pension in 2024? Then claim it back in SAYE 22-23, although SAYE 22-23 is submitted we notice we can still amend SAYE 22-23 under UTR profile? if we cant, thats fine. But going forward how would we reflect this in SAYE in the future? Ensure we pay 1600 into pension from bank account for the relevant year? Under SAYE tax relief... Box 1 Payments to registered pension schemes operating ‘relief at source’ is 1600 * 80 /100 = 2000? Box 1.1 Total of any ‘one-off’ payments is 1600? Box 3 Payments to your employer’s scheme which were not deducted from your pay before tax is £0? Box 4 Payments to an overseas pension scheme is 0?

Hi

No.  Tax relief is only available in the tax year in which the pension payment is made.  You cannot carry it back.

Thank you