How can I get a Thai TIN number with a DTV visa and a stay of over 183 days?

I used expat tax. They did a good job. Really easy.

this is quite confusing - im glad you asked the question

1) You can only get your TIN on year N+1 at the moment you declare and pay taxes if any, which is happening in March of every year, just go to your closest tax office, they may ask for Thai bank statements and matching documents (invoices, payslips), but they won't check your passport nor your visa, so your only issue with DTV is getting a Thai bank account

2) After you got your TIN, you will be able to declare and pay online the next years, no documents are needed to declare online, just enter the amounts and pay

3) But if you want to get a "Certificate of Residency for Tax Purposes" (which is named "R.O.22" in Thailand), after you declared, you need to physically go to your closest tax office and ask for it, they will ask for your passport (to check if you spent >180 days in Thailand) and bank statements, then it takes about a month, during this period they can ask for more documents (invoices, payslips), and then they will deliver it physically to your home address in Thailand (they won't give it by email), that means you must go to Thailand every year after you were a tax resident

I would like to know that who has DTV visa and used to travel around other countries and not living here more than 180days, does she need to get TIN?

So how do you get a TIN without a bank account? Some say you need bank. I pay tax on my home countru and there is a tax treaty, but i need to do the paperwork

Yes, as long as you can demonstrate relevant income, you will get a TIN. Having said that, a mere Thai TIN will not likely be proof for your home country. Instead, you would need a "Thai Tax Certificate of Residence" - which you can only get after you have submitted a tax return.

Yes I went to the tax office and they filed the return and took the payment there

You might have to wait until you are due to pay Thai tax, which is the first 3 months of the year following the year in which you incur a Thai tax liability. To be a Thai tax resident you just need to spend 180 days or more inside Thailand in a calendar year but this in itself may not be enough for the Thai Revenue Department to issue a TIN

Yes no problem