Urgent help: i539 - document returned

Hi,

My case status in USCIS site shows’ Document was returned to USCIS from postoffice".

Which form i need to follow from the page where we can request the document again? from this page.

https://egov.uscis.gov/e-Request/Intro.do.

there are alot of forms names and alot of request types in this site plz help.

( will it be i539 itself to be requested again to resend ?)