Five levels of "Thank you." in Japanese
What is the difference between "Arigatougozaimasu" and "Arigatougozaimashita"?
For now
ありがとうございます。Arigaotougozaimasu.
For the past
Used for something that happened in the past.
ありがとうございました。Arigatougozaimashita.
Japanese bow
Deeper is more polite.