There is not a simple answer to your question so I have included some information from the International Transactional Analysis Association website. The training is now more complex than it was when I was certified in 1974. It was definitely a life changing process for me and has influenced every facet of my personal and professional life.
Transactional analysis is a social psychology developed by Eric Berne, MD (d.1970). Over the past four decades Eric Berne's theory has evolved to include applications to psychotherapy, counseling, education, and organizational development.
Training as a TSTA
International accreditation as a Teaching and Supervising Transactional Analyst (TSTA) is available to individuals who, after becoming a CTA, have received additional training and supervision and passed an oral examination. They are then certified as competent to teach transactional analysis and/or to supervise others in the application of transactional analysis (supervisor). This process takes another 5 -7 years, depending on time devoted. http://ta-trainingandcertification.net/ta-qualifyi...