for or to

[edmondjanet]

Thanks "for" his help. or
Thanks "to" his help.

Thanks "for" your help. or
Thanks "to" your help.
Thank you.

[5jj]

Thanks "for" his help. or
Thanks "to" his help.

Thanks "for" your help. or
Thanks "to" your help.
Thank you.

It depends on.... CONTEXT.

[faryan]

Phrase: thanks to

as a result of; due to:
it‘s thanks to you that he’s in this mess

plural noun: thanks for

an expression of gratitude:
festivals were held to give thanks for the harvest
a letter of thanks

another way of saying thank you: thanks for being so helpful, many thanks