To disconnect a company file, open QuickBooks Online and go to Settings → Apps (or the Intuit App Center), find the Bullfrog Spas North integration, and choose Disconnect. That immediately revokes access; no further data can be read from that company.

Disconnecting does not delete data already synchronised. To have that removed, contact info@bullfrogspasnorth.com.

To reconnect later, return to the QuickBooks integration page and authorise the company again.