To have TMF get a percentage of every purchase you make, You MUST enter through smile.amazon.com.
For setup: go to your account settings, go to “Other programs” select “Change your Amazon Smile charity” and choose TigerMountain Foundation. Once you set your account up that way, every time you buy at smile.amazon.com it automatically generates something for TMF. Do NOT enter through Amazon.com or TMF won’t participate.