Sorry but Iām getting a bit confused and need some clarification for peace of mind. I obtained a Non- Immigrant O-A visa in Australia before I travelled to Thailand. Date of issue is 26 March 2018 and enter before is 25 March 2019. I entered Thailand on 24 April 2018. I am currently in Vietnam for a month or so. To get the extra 12 months on my visa, what date should I enter Thailand by (in March or April). Sorry but the more I read,the more I confuse myself .