Tax year 2016 1099-K forms will be available to eligible customers through the tax portal by January 27, 2017. For more information please see our common 1099 and tax related questions.
How do I add a coupon code at checkout for my preferred customers to receive a discount on their repeat orders?
That is a great question, however PayPal does have a Developer Forum that would be able to better answer your question. Here is a direct link. I hope this will help.
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