We value your patience and understanding in facing challenges with a specific integrated app in QuickBooks Online, 321Tutoring. I'm here to shed some light on this matter.

The integration between QuickBooks Online (QBO) and Invoice Google Calendar was discontinued at midnight on October 31, 2024. A series of emails were disclosed to our clients using this app within their QBO between September 27, 2024, and September 30, 2024. We understand that this news may cause issues for our valued customers who rely on this feature to manage their invoicing efficiently.

Moreover, we are committed to providing our customers with excellent service and meeting their needs. To that end, we suggest considering other apps that offer similar functionality as alternatives to Invoice with Google Calendar. To assist you in finding a suitable option, we have compiled a list of these apps, which can be found at the following link.

Additionally, QBO offers an automatic feature to remind customers of invoice due dates, eliminating the need for manual tracking and concerns about excessive reminders. You can learn more in this article: Send invoice reminders automatically or manually in QuickBooks Online.

Let us know if there's anything else we can assist you with. You can reach out to the Community at any time. Take care!