HI Sally058
Are you able to clarify exactly what is not working?
As each bank feed is treated separately within your company file, you would need to assign an account to it. You cannot have the same account within your file associated to two different bank feeds.
Whilst you can change an associated account, you will need to unmatch any matched transactions on that account, which also involves undoing all bank reconciliations that use those transactions. Once all transactions have been unmatched you will be able to change the associated account on the cancelled bank feed.
Alternatively you could create a new bank account in your chart of accounts and at the start of a month swap over to using that instead of the previous bank account