RE: Does anyone know the table name that holds the information for Payables Transaction Inquiry - By Vendor? Furthermore, how would I programmatically enter a Vendor ID to into that table to narrow the results.

Hi Howell - 

Why are you trying to automate this function?   Have you thought about creating an integration to bring those transactions in from a spreadsheet? 

The PM (Payables) tables you'll want to query for duplicates are:  

• PM00400 (PM Key Master File)
• PM20000 (PM Transaction OPEN file)
• PM30200 (PM Paid Transaction History file)