С оф сайта смарт-визы, откуда я брал инфу(по ней и делал, тм6, очевидно, не актуален): Therefore, Smart Visa holders wishing to obtain a personal driving license must provide proof of the current residence which can be obtained from
1. The Embassy or Consulate of their own nationality. For more information please contact the Embassy or Consulate of your nationality directly
or
2. The Immigration Bureau at One stop service center for visa and work permit (OSS), Chamchuri Square Building by applying for Residence Certificate and submit following documents in person;
COMPLETED APPLICATION FORM RESIDENCE CERTIFICATE IN THAILAND The evidence of your residence. It could be either the receipt of TM.30 (notification to immigration that house-master, owner or the possessor notify you has stayed. the notification receipt through website or telephone are acceptable) or House lease agreement. Passport Copy of your passport (first page and visa page) Copy of TM.6 card