Hi jocelyndaly,
A sales tax ID/reseller's license is a certification saying you are registered to collect sales tax on the goods that you are selling. You only need to get one if you live in the USA or Canada and you can usually apply online. Just Google 'Your state + sales tax'.
Here is a full guide about reseller's license/tax id that you can read through - Link hidden: Login to view
If you need help with anything just let us know.
We'd also love to see you even just through a photo, so kindly upload one next time. Welcome to SaleHoo! :)