Based on a supreme court ruling, an internet-based merchant needs to charge sales tax only when

a. items are purchased through a consumer-to-consumer (c2c) website
b. buyers purchase certain enumerated items
c. the sale price exceeds $100.00
d. buyers live in a state where the merchant has a physical presence

b. buyers purchase certain enumerated items

Explanation:

assuming you are in the home page.

1) go to the upper right hand corner

2) click on your "profile picture"

3) go down to "edit profile"

4) it should be titled as "edit your profile", click on "profile picture"

5) choose a file

6) press "change"

you're profile picture is updated

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plot immersion i am not fully sure with it though