i had to send in the same thing for sd...its just random verification like notsogood said...so you just photocopy the tax form and send it in to admissions, youll be fine
the direct deposit thing...
https://a4.ucsd.edu/tritON/HS?shire=...auth%2Fstudent
if you log on there it will send you to the app..you can set up a bank account directly to your student account, so the school can 'directly deposit' any finaid into your account..so they dont have to mail anything, and if you have more finaid then tution cost it shows the credit on your account...and then you can also pay your tuition that way..so you dont have to worry about mailing in checks and them getting in on time