I want to ensure I provide you the right information you need. Are you referring to printing your W-2 copies A? If so, I'd be glad to guide you through the steps.
First, let's set up your print preferences to W-2 forms:
Go to the Gear icon in your QuickBooks Online (QBO) account.
Select Payroll Settings.
Click the Preferences link, then select Form W-2 Printing Settings.
Select your paper type, then OK.
Then to print your W-2s:
Go to the Taxes menu then select Payroll Tax.
In the Forms section, select the Annual Forms link.
Select the Employer Copies: Form W-2 (W-2, Copies A & D), to print your W-2 copies A.
Choose the appropriate filing period from the dropdown.
Select View to open Adobe Reader in a new window.
Then click the print icon on the Reader toolbar, and select Print again.