Just follow the site, it may be easy to update the Amazon discount anytime. All of the latest coupons and discount codes are shown as soon as they're released. If any Amazon teacher discount is launched, you can also know as soon as possible.

In case you enter a discount code during checkout that doesn't exist or isn't currently active, then you can see the message: “Unable to find a valid discount matching the code entered”.

Surely yes, Amazon's birthday is a special occasion for customers to enjoy a bunch of great discounts, and attached are valuable gifts you can miss out on.

Of course not, most coupons may be used only by you when you received them directly from Amazon. As the Amazon coupon includes your User ID, it cannot be resold or transferred in any way.

Usually, Coupon Stacking is not allowed at Amazon. However, the store will surely give out notice if available.

At the time of updating, Amazon has not applied Student Discount all year round yet. Check the official store and reach out to the customer support team to be clear.