When someone wish you good things like "Happy holidays and blah blah" Is a correct and polite way to answer a flat:
"Thank you, likewise"
Or It should be better to respond:
"Thank you, I wish you the same"
A teacher taught me the "likewise" one, but really I never have heard it in real greetings. Thanks in advance.
Best Answer
It comes down to personal preference, but it's quite common to echo the sentiment back to the person. For example.
It's also quite common to hear more informal responses, such as:
"Many happy returns" (although primarily used nowadays to mark a birthday), as also an acceptable response to "Merry Christmas" and "Happy New Year". The sentiment itself is issued the hope that a happy day being marked would recur many more times.