Sofi Vaults where are the vaults
Sofi people are joining Sofi because of the vaults. I had problem finding them too. I got you cover, here is a step by step details on how you find them.

Step 1: Login into your sofi Dashboard
Step 2: Click on Banking

Step 3: Click on Savings

Step 4: click on Add Vault

Add and name whatever vault you want, I think you can add up to 20 vaults in total. It appears to me that you can only have vaults on your savings account.
Best of luck