local tradeskillName, currentLevel, maxLevel = GetTradeSkillLine();

Returns Edit

tradeskillName 

Name of the current tradeskill

currentLevel 

Current level in tradeskill

maxLevel 

Current maxlevel for tradeskill (based on Journeyman, Expert etc..)

Note: GetTradeSkillLine() works by calling up your profession (ex: Blacksmithing) and pulls the data for the return values. If the profession window does not open, it will return an Unknown value for tradeskillName.