It's a 50 / 50 chance of being quizzed about your entries some IO on the day can be a little anal about things but they have to be seen doing their job even with a visa there is never a guarantee entry it's thailand we are talking about this year I have spent 24 weeks in total in thailand last entry was in July and was questioned about it why you here many time why you not get proper visa next time you have proper visa first time in 25 year ever been asked to see my ticket out showed him and he settled down Chokh di
When in thailand it is thai rules simple every branch has their own set of rules and requirements same as every immigration office all operate on their own rules it's never been one size fits all its thailand remember it's their country we are only visitors or farangs no matter how long we live there
hi Brandon i found the rules change depending immigration office you go to my last extension was 6 weeks ago at jomtien chonburi and they wanted a new TM30 paper copy even though they already had online Tm 30 from D Varee hotel I thought it was a little strange but it's thailand
Front up at immigration fill out application you will require current TM30 passport and a passport photo no older than six months also photo copy of passport page of you recent entry and main page and 1900baht thats what I required only 6 weeks ago you only allowed 1 extension per stay photo copy can be done within immigration or outside immigration most immigration office have photo copy shop visa assistance shop close by Chokh di
You will not be staying in thailand for one year with a tourist visa simple and having correct visa for your stay is still not a guarantee of entry but having correct visa for your stay will help Chokh di you are going to need it
Most of the options given in comments should get you close to your end date but please beware that entry to Thailand is never a guarantee if it appears as you are trying to stay long term without correct visa in the eyes of the IO on day of entry than don't be surprised if you are questioned they don't need a reason not to like you and deny entry Chokh di