1.Click "Connect QuickBooks Account" above
2.Sign in to your QuickBooks account and authorize the app
3.You'll be redirected back here — the refresh token is saved automatically
4.Use "Refresh Token" periodically to keep the connection active (tokens expire every 100 days)
⚠️ Important: In your QuickBooks app at
developer.intuit.com → My Apps → Keys & OAuth, add this
exact Redirect URI:
https://1stcdl.com/api/functions/quickbooksCallback