We are currently outside Thailand but our son is enrolled in an international school in Chiang Mai. Our consulate has informed us that they are willing to grant both parents and our younger son non-O visas and COE so we can accompany our eldest to come back for school. One of us will be able apply for a 1yr extension as the guardian of our son who is in school. Originally we were planning to have to other parent get an ED visa for studying at a language school, my question is will we have any problems extending to ED for 1yr if we are entering on a non-O visa?