You might be able to do it on the Target Pay and benefits website.
https://leplb0420.portal.hewitt.com/web/target/login?forkPage=false is the login page for it. You will need to get your account setup with your TM and SSN and stuff, since it's been a few weeks you SHOULD be in Target's system, which means you should be in the Pay and Benefits system, you just have to verify your info with the system.
I did my direct deposit on a store computer because I was right there, but you might be able to do it on Target pay and benefits, let me see if I can on my account.
EDIT: I'm not seeing it, but it's worth looking through still. HRZone or someone else might be able to confirm or deny if it's on there.
If you get the chance, look at your local benefits your store offers... I've got local fitness discounts, restaurant discounts, and target employee exclusive discounts on items such as Laptops for school, $120 off your yaerly bill at Verizon, 10% Apple iPads and stuff, Verizon gear discounts etc