I recently upgraded to QBO +, now trying to add the pyroll core. When I go to Finish payroll history, it says "Oops, something went wrong, please try again later"

Thanks for bringing up your query here with us, dplc.bookkeeping. I've come to provide you with steps to help you resolve errors when doing payroll tasks in your file.

When running QuickBooks Online (QBO) within your regular browser, sometimes stored cache files can cause an interruption while using our features. To help you run and finish your employee's payroll, let's perform some troubleshooting steps to rule out the possibility of a webpage issue. I'd suggest opening your QBO account in a private window to ensure the program runs seamlessly without storing cached data. 

You can also refer to these keyboard shortcuts to open one:

• For Google Chrome browser: Ctrl + Shift + N
• For Mozilla Firefox browser: Ctrl + Shift + P
• For Safari browser: Command + Shift + N

If the payroll information is populating successfully, you can go back to your default browser and clear its cache or use a different supported browser.

Once everything looks good, you can start managing your employee's paychecks and run payroll reports to help you track business finances, taxes, and other accounting data.

I'll be around anytime on this thread if there's anything else you need further assistance with when running payroll in your account. Keep safe, and have a great weekend ahead!