英文句子, 邊個好D?

第二句好些，第一句實在太不英文學(不評了)

第二句修理：

Please find the attached excel file for you to fill in your choices. Please send it back to us when you have finished it. Thank you very much for your kind-- co-operation.send back要有it(那東西)才成的，
kindly用錯了字，
help一般(英語人)是指救急或者是人情上的幫助，但看來這裏是公事上或行政上的要求資料，用「合作」co-operation或assistance會比較好。

Two sentences have their own issues.

First of all, "fill up" normally refers to physically making something full. Here you refer to a file which can be "updated".
The meaning of "guidance" is not clear.

"as attached" can be put in front of the "excel file" (ie. "update the attached excel file....")

For the second one, the tenses of two verbs "SEND back to us when you FINISHED it " are not in line.

The word kindly in "Your kindly help" is incorrectly used. It should be "kind".

I hope it helps a bit.