You don't realize how functional the tab button on your keyboard is until the day it stops working. If you experience issues and your tab key stops working when trying to toggle between fields in Quickbooks, perform the following steps:
1. Open Quickbooks
2. Click on Edit
3. Click on Preferences
4. Click on General Tab
5. Then place a check mark on "Pressing Enter moves between fields", click ok.
6. Close Quickbooks completely.
7. Re-open Quickbooks and test if issue has been resolved.