Cheers, my last direct interaction with HMRC was when I received two letters from them; one stated I owed them money the other that I had over paid and they owed me money.
2 days on the phone and they agreed they owed me money and wished me good luck in getting it back….so I’m reticent
Best to call HMRC you might be able to agree a non emergency tax code. They tend to be good once you get through to them.