It isn't always necessary to specifically align check fields. Your browser and printer may work together correctly without the need to change alignment settings.
For best results, we recommend that you use checks specifically designed for QuickBooks Online.
To align expense checks to print:
In the navigation bar, click Transactions > Expenses (or Expenses > Expenses depending on what you see).
Once the sample is printed on plain paper, hold it up to the light against a check to check the alignment.
In the Print window, be sure to print using actual size. This means you may need to clear any options or properties that scale, shrink, or fit to size.
For most users, printing from a Chrome browser provides the best first-time experience.
Print checks: What do the horizontal and vertical numbers mean?