Please is better than kindly. You should say .....and include the last version.................
No, that is not good. One major problem is "it for you". Those words do not belong. They have the odd effect of creating a string of words that seems to be a sentence. It's a little difficult to explain. Better to say: Please [or kindly] find the attached file that you requested.
yes that is the correct grammer im pretty sure
No, "as previously discuss" is not correct grammar. It should be "as previously discussed."
Yes, that is correct. But there should not be an article("a") before "correct".
Correct grammar would be "How are Lucy and Desi?"
Yes, "he butts in" is correct grammar, although it is somewhat informal language.
No, the phrase "kindly find attached for your signature" is not grammatically correct. In order to make this sentence correct, you will need to state what is attached, such as "kindly find the contract attached for your signature."
no it should be a haphazard
No, it should be the biggest.
It is not correct. The correct usage is: waiting to hear from you.
"Definitely i'll join these group too" is not correct grammar. The correct grammar is "Definitely, i will join this group too."