Hi dkeslar,
A browser issue could have triggered this behavior. Let's check this out.
To start, you'll want to sign in to QuickBooks using a private browser. This step disables its extensions and stops the cache from saving your browsing history.
- Google Chrome: Ctrl + Shift + N
- MS Edge and Firefox: Ctrl + Shift + P
- Safari: Command + Shift + N
If you can select a bill and choose a date, you can go back to your regular browser and clear the cache. If it's the same thing, please try other browsers to see if this one happens to a particular browser or not.
You can always go back to this thread if you have other questions about paying bills online.
