Couple of ways to do that.
1. Click on the Community tab in the header (where you see User CP).
2. Click My Garage.
3. Add a vehicle or service record etc.
Next option...
1. Click User CP.
2. On the left side, click Edit Your Details.
3. Scroll down to "Please click here if you want to modify your vehicles in your garage."
4. Add a vehicle or service record etc.
If you want to modify a vehicle name, add special wording behind it like "TRD" "V8" etc., you will need to either delete the current vehicle or PM me with your request and I'll take care of it free of charge.
If you've already entered in a dozen service records and don't want to delete the vehicle, contact me, I'll fix it however you want it.
Hope that helps, let me know if you need something else. Sorry it took so long to answer your question.
__________________
My Truck: 2005 Tundra, 2UZFE. 4WD. AccessCab. Spectra Blue Mica (8M6). TRD. AT. CC. CK. DZ. FE. AW. LD. OF. TO. VP. 
Suspension & Tires: 285/75-16 BFG T/A'ko, Fabtech Coils, 1.5" Wheeler's blocks, Toytec Diff Drop, 1.25" Spidertrax [front], 1.5" Goeske Wheel Adapters [rear]
Handling: TC Poly Steering Rack Bushings, Downey HD End Links, Wheeler's Anti-Sway Kit, Hellwig 7700 Swaybar, Timbren Rear SES
Electrical: URD MAF Sensor Calibrator, Superlift Truspeed Speed Sensor Re-Calibrator, ScangaugeII, Full LED Conversion
Stereo: Alpine CDA-9886, Alpine & Phoenix Gold amps, Q-Logic box w/RF subs, eDead
Cosmetic: Line-X Bedliner, Custom N-Fab Steps, Rear Diff Breather Extension, F103N Fumoto Oil Drain Valve, Debadged (partially), Bell Truck Trunk, Access Vanish Tonneau
Get TundraSolutions shirts and other gear, click HERE | Want to advertise on TundraSolutions.com? click HERE
Even if you are virtually stupid, don't look stupid online. Download a FREE spellcheck −−→ click HERE
Be an organ & tissue donor, register at DonateLife