Open "My Store" on Wangwang (or click "View My Store" on the left of "My Taobao"). It's very simple to know the address of your own store:

After opening your store, click your store name on the upper left (that is, "Homepage >> Taobao Store >> "Your Store" displayed below Taobao), and you can find it by looking at the address bar after the page opens.

Or in "My Taobao"---click "Manage My Store" on the left---click "View My Store" in the upper right corner, open your store and look at the address bar, and you can find it.