What is the difference between the pink and blue ID cards, and which one do I need for a Thai tax ID?

In Thailand, there are two types of ID cards: a pink foreigner ID card and a blue ID card for Thai nationals. The pink card is for foreigners, but you do not need it to obtain a Thai Tax Identification Number (TIN). To get a TIN, you only need your passport and proof of address, such as a residency certificate, a yellow house book, or a rental agreement. It is also suggested to seek professional advice or assistance to navigate the process, especially if you need help acquiring the TIN.