To disconnect your QuickBooks, go to Add-ons > QuickBooks from the main menu and click the 'On' switch to toggle it to 'Off'.
Confirm the disable action by clicking on 'Disable'.
You will be taken back to Add-ons > QuickBooks where you can verify that the integration has been disabled.
Please Note: Once disabled, you will no longer be able to send data from nabooki to QuickBooks. All the QuickBooks tax codes which were imported to nabooki, will be removed from nabooki. The data which is already transferred to QuickBooks, will not be removed.
If you reconnect your nabooki account with same QuickBooks account, QuickBooks tax codes will get imported and all previously transferred data can be accessed again.