Hi CatLagerfeld,
Pease see:
HS227 Losses (2023)
Any losses in tax year 2020-21 should be set against the next available profit.
If you made a profit in 2021-22 then your loss should have been offset against this year.
As it is now too late for you to amend your 2021-22 Self Assessment return online you can write to us and ask us to amend it for you.
Please see Self Assessment tax returns:
Self Assessment tax returns
Thank you.