thanks for your response. I don't know if i could post the pic of the visa stamp here. On my case, they issued visa with three months validity and then they stamped Void. I googled the same (as my travel agency also got no idea why this happened), and found that few people have also faced this void stamp issue in the recent times. Regarding tax returns, it was just my assumption as i read in a visa related forum that some visa may be denied for unmarried individuals if they don't provide enough financial evidence. Regarding the waiting period for void stamp, when i called the officials of Thai consulate in my country, they have told me that I have to wait until the mentioned visa period gets over before applying for another visa. Also for India we have only two options, either we can apply for a tourist visa here in the Thai consulate office for the validity of 60 days (through a travel agency or by person) or an option of visa on arrival of 15 days validity. By the way I went through this travel agency as they were reputed in my city. Also thru them only i got my previous tourist visa.
thanks much for your response. I'm an introvert. So I'm little uncomfortable to attend the class in person. I wanted to do a vacation in Thailand for couple of months. Hence I thought i could do a simultaneous thai language learning online while coming there.
Thank you for your response. I did have enough balance on my bank account while submitting the bank statement. I read in a visa related forum that they may deny visa for some unmarried individuals and for not submitting enough financial supported documents like income tax statement. So i just assumed that may be the reason for my denial.