@inhawaii - I'll start by saying I know eBay has been phasing in different aspects of Managed Payments, so you may or may not see the same thing I do, but hopefully this will help.
If you go to the Payments section and click on Reports on the left side navigation, you can create a transaction report set for a customer date range covering up to a year at a time, so just set it from whenever you started MP to date. You can also check or uncheck any of the boxes here to determine which kinds of transactions you want in the report.
Most of the columns may not be applicable, but depending on what your accountant needs you or they should be able to open it in Excel or other spreadsheet program and sort/filter the report by buyer's state to see just the ones you need. I'm guessing the gross transaction amount may be what they are looking for, but this report will also show fees and sales tax as well if need they need that.
I squished some of the columns just to make it easier to take the screenshot, but play around with that report and I think it will have what you need.
