請教文法問題..謝謝請附上解釋

1.Enclosed please find an application form that you should return as soon as possible.
Here is the order of things:
An application form is enclosed ----> you should complete the form -----> then you should return it as soon as possible (if you want to get the application in early).

Include 'complete' in the sentence to become:
Enclosed please find an application form that you should complete and return as soon as possible.

this question is dif. (for me) coz the asker doesn't tell if it's email or not, and i don't know whether the application form should be filled out also.

1.Enclosed please find an application form that you should return as soon as possible.

should it be extracted from part of a letter?

in my opinion, it is to ask someboby to find something as soon as possible, and that something refers to -an appilcation form that should be returned.

the errors might be corrected like:
i. Simply use p.s. to replace Enclose for it is not about things inserted in an evelope or a package. It seems to be a kind of postscripts, additional to the main context.
ii. use definite article instead of article a, as both sides know about that application form mentioned. Make it the appilcation form.

I think "an appliaction form" should be changed into "the application form" as you are talking about the particular form.
And I think the use of " as soon as possible" is not appropriate, you should state an exact due date instead, i.e. "that you should return on/before 3/11/2008, for example.
Or is it better to use passive voice in this situation?
Enclosed please find the appliaction form that should be returned on or before XXX.

this is my opinion, i'm not sure if it is correct.