Huffman - who starred in the hit TV show Desperate Housewives - was released on $250,000 bond on Tuesday.
It is alleged Huffman paid $15,000, which she concealed as a charitable donation, to arrange for someone to change her daughter's answers during the SAT exams.
Huffman has been charged with conspiracy to commit mail fraud.
A judge has ordered the 56-year-old to restrict her travel to continental US. She has also surrendered her passport.