How do I handle tax collection for US sales on an online platform?

[ThienBui]

I am checking the tax collecting on Shopify? 
When you are selling in US Market, what things need to be done for tax collecting? 
Please help me, I don't know whether I need to collect tax from customers and what to do?

[Don]

Hi there, @ThienBui!

We're not able to provide advice on your liabilities in terms of taxation from here in Shopify so would always have to direct you to consult a qualified expert in your jurisdiction so you understand what you need to be charging.

When you do understand your tax requirements you can learn how to set up US taxes here on our help site. 

There's more info here as well on determining your tax liabilities in our US taxes reference. 

All the best!