In Have Sent or Had Sent?

I Have sent- Is when I sent something like 2 seconds ago. I Had sent- Is when I sent something a few months or years ago.

Which is correct I have sent or I have send?

I have sent you an email vs I have send you an email. When using the helping verb have, the correct form of the past tense of the verb to send is sent. Expert Tip! If the action is complete, it is usually better to use the more direct form, I sent you an email.

Have sent or have been sent?

Since the sending happened in the past (maybe just a few seconds ago, but in the past), you should use either the simple past tense (preterite): I was sent here. or the present perfect: I have been sent here.