Mscore, they want me to put down a payment by 4/12. I think It's different for everyone depending on the day u got accepted. They give u 2 weeks from the day u get the acceptance email. And within that 2-week period, u have to accept/confirm their offer, pay the $280 deposit, confirm the offer again on the Graduate Statement of Intent form online, set up the USC email account, and send the Field Placement forms (via mail). The placement forms are kinda long. U also need to write another personal statement that's different from your original one but some of the contents are very similar.