To set up direct deposit with USAA, you'll need to provide your employer with the following information:
*UPDATE from Moderator to correct link.
I was able to locate the direct deposit form the following way:
1. Click on "My Accounts"
2. Under your banking information, click on your bank account (blue linked)
3. On the next page, click on "Account Features"
4. Next, click on "Help Me Switch My Direct Deposit", under the Direct Deposit heading
5. Follow the instructions.
I hope this helps.