GCSS-Army can be tough to figure out all on your own, but if you forget how to do something I suggest you go back into GTRAC and review the Master Driver course. One tip is to save the PDF files that are available from the exercises, then you have a quick access to the step by step.
This handbook is just giving you the T-codes and quick description of what each ones does.
Licensing
PPPD – Display Qualification Profile
PPPM – Update Qualification Profile
ZOQM – Add Multiple Qualifications
ZPEPP – Print Qualification Record (print 348-E)
ZOPID – Print Operator Permits (print licenses)
Operator/Equipment Updates
ZNSTDQ – Create non-standard equipment code
PA51 – Display Badges and Awards
PA61 – Maintain Badges and Awards
Reports
ZXPQ – Expired Qualification Report
ZFNQ – Operator Qualification Search
ZOPLR – Operator Permit Ledger
ZSEC1 – Display Positions and Users
ZLICWB – Licensing/Qualification Workbench This is a one stop spot that was recently added. If you use this workbench there is a link for each of the above listed t-codes. All you have to do is click and it takes you to the spot you want.
Master Driver Handbook 