You can delete an Account in Budgetizer in several ways:
When you delete an Account, several things happen. First of all, the Account no longer appears in any screen, and you can no longer make transactions to or from it. Secondly, all transactions that were in the Account are also deleted. This also means that any transactions which also added or removed money from any Budget Items are also deleted. Finally, any transfers which were made to or from other Accounts still exist in the other Account, but they will now act like debits or credits.
See also Accounts Transactions