Sorted
As near as I can tell, all the information I need for computing sales taxes has been separated from all the information I don't need, but will eventually need for computing income taxes. All of the receipts and other 2007 correspondence that I know about have been sorted.
I still need to go through the actual sales information, figure out what was paid for where, and fill in the blanks. Probably over the weekend. Yes, I should have kept better records. Dumb bear.