Carry over

Anonymous101

Would someone be able to clarify or point me towards some information which might clarify pension carry over and how this works?

Dox

Good, clear explanation of carry forward here: https://www.pensionbee.com/pensions-explained/pension-contributions/pension-carry-forward-rule

Anonymous101

Thanks for the link.
I understand how this works in theory but in practice how does one go about implementing it.
E.g. I pay £5k nett into a SIPP. This will automatically receive the 20%  basic rate and i claim the remaining 20% HR. Is that it? No further communication about the carry forward?
Or if I were to increase my Sal Sac from say £40k pa to £50k pa for next tax year, would I need to communicate that £10k of this was carry over?