How does “Where a bill comes from” work on the Bills page?

A bill is read from its paper in BillScan and pushed to the company's Xero organisation, or entered in Xero directly; either way the sync carries it here with its status, amounts and project. What you see is what Xero holds, as of the last sync named under the title, and Refresh re-reads that store without a Xero call. The period filter defaults to the last twelve months so the list opens on current work; a search runs across all time and says so. Where: Bills (/accounts/purchase).