After your federal tax return is processed, the IRS will refund any overpayment you made during the previous year. That money doesn't come immediately, though: Even if you file electronically and set ...

Think of a REST API like a waiter in a restaurant. You (an app) tell the waiter what you want (your request), and the waiter goes to the kitchen (the server) to get it for you. REST is just a set of ...