How do you create a top vendor list for the last 12 months for the auditors?

To create a top vendor list for the last 12 month for the auditors, first run Update Year to Date Vouchered Amount (P04820) using the appropriate From and Thru Dates. Then run Supplier Analysis (P04602). If the Supplier Analysis report doesn't generate the expected results, you can run a World Writer over the F0401 to obtain the desired result.