Both directions
Connect it once.
Clients become customers, invoices become invoices, and payments recorded on either side show up on the other. The sync status sits on every invoice.
QuickBooks Online
Connected · Decent Design Co. · last sync a minute ago
Decent Billing
Foster & Lamb PublishingClient✓ Synced to QuickBooks
DB-1030 · $21,021.28Invoice sent✓ Synced to QuickBooks
Payment · $21,021.28Card · Oct 3✓ Synced to QuickBooks
DB-1031 · $12,696.00DraftPending sync