Hello there, @seabreezemom.
I'm sad to know that you're having trouble syncing your Google calendar to your invoices.
Due to pandemic, we have limited staffing and have reduced our phone hours. That is the reason why you're unable to see the option for our call back.
However, with the concern that you have, I recommend reaching out for our phone support, for they have the appropriate tool that can help you fix the synching problem.
You can refer to this article to reach our phone support and, the available support hours: Contact the QuickBooks Online Customer Support team.
Please let me know if you have additional concerns. I'd be glad to assist you right away. Always stay safe.