After you passed your initial exam, will need to log into CORES to pay your $35 FCC processing fee once your application has been submitted via the VEC. You can look to see if your application has been submitted by using the ULS Application Search by your FRN. Once the application has been submitted, you have 10 days to pay. This is important to watch for. More information can be found on the FCC site about the fees.
Are you an upgrade? Lucky for you, you won't need to pay the $35, they don't charge for upgrades.
New Hams: The FCC processes applications daily. If you pay your fee before 6 pm Eastern on business days (excluding federal holidays), your license will be processed the following day. If you pay after that time, it will take 2 business days.
License Upgrades: Your upgrade will appear immediately after the VEC office uploads your application. This is generally within a couple of business days of your test.