Standard due-date terms shared between invoices and bills.

Bookkeepers standardizing payment timelines
Payment Terms defines reusable due-date rules (Net 15, Net 30, Due on Receipt, and so on) shared by both invoices (AR) and bills (AP), so due dates are calculated consistently instead of typed by hand each time.
See how Payment Terms fits into a plan on pricing, or how Count My Bucks compares to QuickBooks.