To disconnect your QuickBooks account from Katana:
1. Go to "Settings" in Katana and click on the "Integrations" tab.
2. Find a QuickBooks logo and click on "Disconnect".
The "Invoice" column from your Katana "Sell" screen and the "Bill" column from your "Buy" screen will disappear.
You can reconnect to your QuickBooks account at any time by following the process described in this article.