Marci, the first blue green bar down from the top of the screen shows User CP/ Rules & Guidelines/ Community/ Calendar, etc....
Click on "USER CP"
Once the menu pops up, click on "Edit Signature" on the left hand side menu, under settings and options.
You can add your signature there, including any information you want. And then you can change it any time.
2C/ Coarse/ Normal porosity/ SW Florida/ Transitioning to gray
Cleanse: CJ Daily Fix, JC Cleansing Cream, TJ Tea Tree Condish
Condish: JC Too Shea, CJ Curl Rehab (both as RO & LI)
Stylers: UFD CM, CJ PP, JC Spiralicious, Darcy's Cream Gel & Cocoa bean whip