If you say this, you are never wrong. It is polite and also appropriate in formal situations when you are talking to older people or people in higher positions. But it is also regularly used with friends.
At the end of a sentence Thais use and . Women use , and men use . If you don't use or you sound odd or slightly rude. Read this article, if you want to learn more about polite particles in Thai.
Thank You Very Much - for most situations
Women say: Men say: means very, or a lot.
See it in this video:
Thank You - when you are with friends
Here is what to use when you want to sound less formal: Women can say: (using not ) or: (using not ) Men say: Here is a short video:
You can use or as an alternative to when you are with friends.
Unisex: Women say: Women say:
Unisex: Women say: Women say: Men say: or: Read aloud. I mean read it now. Yes, it's the English "THANK YOU". Nowadays it's completely fine to use the English "Thank You" and add a polite ending.
Thais love their ending particles. You can add before and to make it "flow easier". Also, as a woman, you can also use or , so it sounds more "cute". This is even done by adults, it can be used by women of any age. Men can turn 'krab' into 'kab'. The Thai writing stays the same, you just leave out the "r" sound when you pronounce it. That's what most Thais do anyway.