Hi, I had same issue, this field is strange and not editable. Having said that, you can still make payment to your vendor. In most of cases, bank doesn't care of account type as long as three things matches (often called ‘Confirmation of Payee’ OR CoP) , Routing number, Bank account number, Payee name. It may give you warning like 'The account name provided is a match, but the account is a Personal Account not a Business one.; But bank will process payment.
