I have QB online along with Payroll, how do I add a signature to print on a check?

Hi accounting315,

The option to add a signature on a check is currently unavailable in QuickBooks Online (QBO). As a workaround, you can add a signature on pre-printed checks. 

For best compatibility, you can order a pre-printed check by clicking on the Gear icon and selecting Order Checks. 

I've added an article about setting up alignment for printing checks: Align how your checks print. This helps provide some tips on how to align the print.

We're only a couple clicks away if you need anything else. We'll be sure to get back to you. Have a wonderful day.