It is possible that to face error 15270 even after installing payroll updates in QuickBooks Desktop as there are some other reasons too that can trigger the issue. Follow the solutions below and fix problems with your QuickBooks Desktop application that prevent it from downloading the payroll updates.
First, you must make sure your internet connection is working fine.
Now download and install QuickBooks Tool Hub and run Quick Fix My Program that you will find under the Program Problems tab.
You must also verify the status of your payroll services.
Finally, reactivate the payroll using the correct payroll service key and add a valid EIN to the company file.
Once all the above is done, retry to download the payroll updates and check if the QuickBooks error 15270 is resolved. If not, dial 1-855-856-0042 and contact the QuickBooks payroll support team for additional troubleshooting help and assistance.