According to Intuit, error code 20888 39915 can occur when attempting to pay employees.
To resolve this error, Intuit recommends these 3 troubleshooting steps:
- Update payroll tax tables (Employees->Get Payroll Updates menu selection)
- Update QuickBooks to the latest release
- Run the Rebuild Data utility
When updating payroll tax tables, be sure that Download entire payroll update is selected in the Get Payroll Updates window, as shown below.
To verify your version and release of QuickBooks, press F2 while QuickBooks is running to display the Product Information window. The Product field shows the version and release at the top left of the window. In the example below, Premier Accountant Edition 2009 is the version and R3P is the release. To update QuickBooks, click on the Help->Update QuickBooks… menu selection.
For more information on this error code, consult this Intuit knowledge base article.