How do I get all of my payroll data or any payroll data imported from desktop version?

It's my pleasure to help you today, info932.

Most of your payroll data doesn't transfer to QBO. Paychecks created from QBDT will be converted as regular checks. There will be a lump sum import of current year's paycheck information and may need to enter a prior payroll for the past year-to-date payroll info for each employee.

For the steps on how to enter historical payroll information, please refer below:

1. Go to the Workers menu at the left panel.
2. Choose the Employees page.
3. Select the employee to open the information, then Enter prior pay details. 

For more information about the process, consider checking out this article with visual guide: Set up a prior payroll.

Learn more about what can and cannot be imported when switching from QuickBooks Desktop to QuickBooks Online: What to expect when you switch from QuickBooks Desktop to QuickBooks Online.

You can always get back to me for more questions, Take care and have a wonderful day ahead!

Ok, there isn't a workers tab just payroll tab. Clicked on payroll, employee but the employees from desktop aren't there.  They were inactive when I did the import.  Please, how do I enter fix the historical payroll data?

Thanks getting back to us with additional details about the employee's status, info932.

Inactive employees will not be transferred over to QBO, only the active ones. You can manually set them up in QBO so you can start recording their prior payroll data. Here's how: 

1. Go back to the Employee's tab under the Payroll menu.
2. Click Add employee.
3. Enter the Employee Personal Details, then select Next
4. Enter Employment Details, i.e. start date, pay rate, etc., then select Next
5. Enter Tax File Declaration Information
6. Click Done.

Once done, follow the steps given in the first reply on how you can add their historical payroll.

Since you're new to the Online Payroll version, let me share this Getting Started Guide to easily navigate the feature: Get Started With Payroll.

Let me know if you have other questions. We're always here to help.