I have 2 payrolls from the 2nd qtr. that wasn't moved over during the migration. It was done on my desktop, reports filed no taxes owed. How do I update emp. ytd, etc?

Thank you for reaching out to the QuickBooks Community, tgray45!

You can do this by adding the pay history information to QuickBooks Online. Before you begin, you’ll need a few key pieces of information. 

• Employee pay stubs or payroll reports with year-to-date amounts. The stubs or reports should show each pay item, deduction, tax and net pay.
• If you’re starting with us in the 2nd, 3rd, or 4th quarter: employee pay stubs or payroll reports dated on or before the last day of the closed quarter.
  • Quarter 1: January 1 - March 31
  • Quarter 2: April 1 - June 30
  • Quarter 3: July 1 - September 30
  • Quarter 4: October 1 - December 31
  •  

Then you would have to start the setup which the instructions can be followed below. They included a video presentation as a guide as well. 

• Add pay history to QuickBooks Online Payroll

Please let me know if you have any other questions or concerns. I will be here to assist.