Hi there, sue21.
We have several recommended troubleshooting steps to resolve alignment issues when printing checks in QuickBooks Online.
Start by installing the Adobe Acrobat Reader 11.0. If you're using Windows, open this link to install Adobe Acrobat Reader 11.0: https://helpx.adobe.com/acrobat/kb/install-reader-dc-windows.html.
If you're using Mac, this link will get you to the right page: https://helpx.adobe.com/acrobat/kb/install-reader-dc-mac-os.html.
You can also follow these steps to change or adjust the alignment:
You can also check out this article for more details: How To Print Sales Forms.
Please let me know if you have follow-up questions. I'll get back here to help you again.