Hello there, @accounts61,
We haven't received any reported issues about QuickBooks being unable to create a new bill.
To fix this, let's perform some troubleshooting steps to help isolate the issue. First, you'll need to use a private browser since it doesn’t store data in the cache. By doing so, we can check to see if this is a browser-related or not.
To open a private browser, you can press Ctrl + Shift + N on your keyboard if you're using Google Chrome. For Internet Explorer and Mozilla Firefox, press Ctrl + Shift + P. You can press Command + Shift +N for Safari.
If the private browser works, you can clear the cache on your regular browser. This way, it will hep fix the unexpected behavior of the product. If the private browser doesn't work, I'd suggest using another compatible browser.
Once done, you'll need to sign back into your QuickBooks Online account. Then, let's check to see if you're able to enter new bills in the program.
This will get you on the right path, @accounts61.
Drop me a line below if there's anything else you need. Have a wonderful day ahead.