I appreciate you for posting here in the Community, @ssummers123. Let's work together to fix the issue of why you're unable to print a check in your QuickBooks Online (QBO).
Beforehand, may I know if you see the Print check and Print later options of your vendor check transaction? It would also be great if you could add some screenshots too, so I can get a better view of it and share the best fix for it.
One of the possible reasons why you're having trouble logging in can be sometimes caused by a stored cache and cookies in your browser. Let's try accessing your QBO account through an incognito window and print your checks from there to determine if it's a browser-related issue. Here are the shortcut keys:
- Google Chrome: press Ctrl + Shift + N
- Mozilla Firefox: press Ctrl + Shift + P
- Safari: press Command + Shift + N
Once you're in incognito mode, login to your QBO account, go to the check transaction to see if you can print it. If it works, you can go back to your regular browser and clear the cache to improve the program's performance. Otherwise, using other supported browsers can be a good alternative too.
If the bill payments or checks are not showing up in the Print Checks window, you can verify if you've selected the correct account and checked the Print Later box. Visit this article for more details: Bill payments or checks are missing from the print queue.
I'm willing to hear you out if you need further guidance in printing vendor checks in QBO, and I'll get back to you as soon as possible. Keep safe!