The invoice list can show which reservation each invoice belongs to and its billing period, and CSV exports match what's on your screen.
Add the columns
Go to Bookkeeping → Invoices.
Click Customize table.
Turn on Reservation, Billing period start, and/or Billing period end. Changes apply immediately — there's no separate save step.
These columns are off by default. The Reservation column shows the linked reservation's guest and unit; it goes blank if that reservation is later deleted.
Export matches what you see
Downloading the CSV from the invoice list exports exactly the invoices currently shown — your active status tab, filters, and search all apply to the file, not just the screen.
Heads up: these columns are inserted within the CSV layout rather than added at the end, so if you import this file into a saved spreadsheet template, you may need to re-map your columns.
