Our Trustee sent us a letter asking us to mail:
Copy of all titles for vehicles
Copy of all deeds for home
3 years of tax returns
3 months of bank statements
Copies of paycheck stubs
A statement detailing how much money was owed to us by our employer(s) for the week that we filed.
Social Security cards
Drivers licenses
I think that's all we sent, but every Trustee is different.