Hi there, @userjamie-moss.
I'd like to ensure that we're on the same page so I can provide the right amount of information for your concern.
I want to ask if you're referring to customising the account type of your accounts in the Chart of Account or you're trying to edit the categories of your downloaded bank transactions. Any further details about this matter are much appreciated.
Please get back to me with more information, and we'll take it from there.
I'll be keeping an eye out for your response to this. Take care!