Hi, I created tax code and tax rate using QBO API and If I query the API, I can see the tax code and tax rate but it's not showing up when I login to QB.

Hi there, 

Thanks for reaching out for support. 

QuickBooks Online is designed to help you succeed in any way possible. That's why we've created the Intuit Developer Program, for tech-savvy individuals to explore beyond the scope of what's readily available in QuickBooks.

I'm so happy to hear you've used the API to create a brand new tax code and tax rate. For any questions pertaining to API or similar developments, you'll need to contact the Intuit Developer Support team. Here's where to go to do that: Intuit Developer Support. 

This team deals directly with integration of the API into QuickBooks Online, and they'll be able to help you out with any questions you may have. 

Let me know if there's anything else I can do for you. 

Cheers!