I'll connect you with the appropriate support team that specializes in API integrations for creating project estimates, Joe.
We have a dedicated forum for addressing API issues in QuickBooks Online, where developers can discuss programming and syncing problems as well as share helpful solutions. You can follow the steps outlined below:
- Visit Intuit Developer Support.
- Select QuickBooks Online under What do you need help with?, and click Ask a question.
- Log in to your Intuit Developer Account or create a new one.
- Sign in to your Intuit account when prompted.
- Enter a brief description of your concern and click Ask.

You can always count on our Community Forum if you have additional questions or concerns, and we will be here to help.