Can I export employee data including W4

Yes, you can, @john-tyrrell17.

In QuickBooks Online (QBO), we have the Employee Details report that you can run. It will show a snapshot of each employee, including pay rate, deductions, and tax withholding. 

To pull up and export the report, let me show you how:

1. In the left menu, click Reports.
2. Type in Employee Details in the search field. 
3. Set the Employee and Work location filter.
4. Click Run Report.
5. Click the Share drop-down button in the upper right hand.
6. Select Export to Excel.

To know more about exporting your payroll information in QBO, see this article: Import and export employee data.

If you need to personalize a report to get the right data you need, here's a resource you can check: Customize reports in QuickBooks Online. You may also be interested in this link to know more about available payroll reports you can use to view information about your business and employees: Run payroll reports. 

If I can be of additional assistance, or should you have any follow up questions when exporting data, let me know in the comment section. I’ll be here to help. Have a good one.