Decisions your suppliers make as they react to changes in where they are required to collect sales tax can greatly impact your relationship with them as a customer. Will all your suppliers start collecting tax? Are they doing it correctly? Can you trust what they are doing? Accounts payable departments are the first line of defense in ensuring supplier tax responsibilities are being properly managed. If the AP department isn’t evaluating the taxes suppliers are charging, costs could increase, and sales tax overpayments are likely to occur.
Source: salestaxinstitute.com