1.Navigate to the AppData folder. The default location is C:\Users\(username)\AppData\Local\Intuit\(Your QuickBooks Desktop version).
2 Find QBWUSER. INI and then open it using Notepad.
3.Press CTRL + F and then find MULTIUSERMODE.
4.Change the value to “Y” (MULTIUSERMODE=Y).
5. Save the file.