Hello there, derstine.
I'll be sure to route you to the best support available that can address your concern about getting the print check.
We have a separate forum called Intuit Developer. It is where you can seek answers to questions about APIs, and other application resources. You can visit them through this link: Intuit Developer.
Aside from that, we also have a different section where you can find API-related resources. Feel free to check this link: API Explorer.
Also, you can check out our help topics from the Help page to familiarize yourself with QuickBook's features and functions.
Feel free to reply if you have more questions about the check function or any features in QuickBooks Online. I'm here to help.