@AlnoorCassim, thanks for replying. I think I will just let the Sage support handle it there way. I don't want to drop a name that shouldn't be out here.
The BOI code belongs to a third party called Exactor that does Sales Tax similar to Avalara. The client found this product on there own and came to me to determine if it could be interfaced. I suggested it would likely be expensive and suggested they check out Avalara. They indicated they had done that and had a bad taste in their mouth about it. I checked and determined Exactor already had done a BOI interface which was in use by several clients. As there wasn't any real need to be involved, I left it with the client's IT and Exactor. They have kept me in the email loop and when the error appeared, I checked and found nothing and suggested the customer start a case with Sage. They did but haven't heard back. I am going to suggest the client lean on Exactor to use their BOI resources.
@MyronStevenson, the modules a Tax interface would need are all licensed.