Your QuickBooks Online account can be disconnected for a variety of reasons. It might be that your subscription has expired, you’ve changed the login credentials, or the period that you’ve authorized API Nation connection is over. Whichever case it may be, you can reconnect your QuickBooks Online account in three simple steps.
Log in to your API Nation account and access the QuickBooks Online account through the following link:
Go to Accounts. You should see an exclamation mark by the account name that is disconnected.
Click the exclamation mark and log into QuickBooks Online to reconnect your sync.
With this your QuickBooks Online account should be reconnected to API Nation and your other apps. If you require further assistance please contact us. Have a nice day!