Hello knoxkj,
I'm glad you came to the Community!
If you're currently using Firefox when printing, you may have to disable the Firefox PDF viewer and re-enable Adobe Reader.
Please go to this article for more details:
https://community.intuit.com/articles/1145275-printing-invoices-checks-and-other-pdf-forms-in-firefo...
Here's an article that you can visit to help you adjust
the alignment for your checks:
https://community.intuit.com/articles/1145769-printing-how-to-set-up-or-adjust-alignment-when-printi...
You may also want to try another
browser. The recommended browser is Chrome.
When you're done doing the basic troubleshooting steps and you're still having the same problem, please get in touch with one of our QuickBooks Technical Specialists for further assistance.
You can contact them through this link: Official QuickBooks Contact Number.
Let me know if you need further assistance. Thanks, knoxkj!