Thank You So Much was created on 2006-02-19.
Thank You Very Much was created in 1992.
Dear ... Thank-you so much for ...
Thank-you
Your parents do so much for you, you should thank them for it. They do so much to help you. Plus today is Thanksgiving.
you say:"Thank you so much for this invitation"
Thank you
"Arigatou gozaimasu" is the phrase for "thank you so much" in Japanese.
You are welcome very much!
Either is fine. The point is that you are going a bit beyond the simple "thank you" and giving emphasis to your gratitude. Probably in the US, "thank you very much" is more common and especially more appropriate for written correspondence. "Thank you so much" is a bit less formal; and while either expression is still fine, "thank you so much" is more likely to be used between good friends.
Thank you so much for coming to my 50th birthday party.
It's Arabic for "Thank you so much, my darling."
Thank-you