I appreciate you getting back to us, @grace39. Allow me to step in and outline the steps to access Adobe Acrobat Reader so you can align vendor checks in QuickBooks Online (QBO) when printing.
If the sample print didn't align with the blank check, we recommend using Adobe Acrobat for Standard and Voucher checks. Since QBO uses a default browser when previewing, save the vendor check as a PDF before opening it with Adobe Acrobat Reader. To do that:
- Go to + New and select Print Checks.
- Select the checks you need to print and click Preview and Print.
- Click the printer icon and choose Save as PDF in the Destination dropdown.
- Hit Save.

- Locate the saved PDF. Right-click the file, select Open with, and then Adobe Acrobat Reader DC.

When prompted to choose Adobe Acrobat Reader as your default PDF application, select Yes and follow the on-screen instructions.
Before printing, go through the print setup to ensure your printer and checks line up. You can use your own checks to print, but they must be set up for QBO. You may also directly purchase QuickBooks-compatible checks from Intuit.
Let me know in the comments below whenever you have additional questions concerning printing checks in QBO. I'm always willing to lend you a hand anytime. Take care, and have a great rest of the day!
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