In Adagio, you can indicate whether to keep 1099 amounts for a vendor (same as in ACCPAC Plus). Why do you have separate data files?

If you need to keep track of different types of 1099 amounts for a single vendor, then we recommend you set up two different vendor accounts in Payables.

Here is a list of our US Resellers. We have several in the LA area (although I know that covers a lot of territory).