According to the ETS, the conducting body of TOEFL, as it is an English language proficiency test, so, there will not be any specific eligibility criteria for giving the TOEFL exam. Anyone who wishes to work or study abroad can give this exam in order to prove his/her English language proficiency for getting admissions in the universities or organizations based in English speaking countries. Apart from this, there is also no set age limit for giving the TOEFL exam, generally, those who have completed their high school or equivalent can give this exam.