Please read these two articles before proceeding -

1. https://www.mooresrowland.tax/2017/03/if-im-not-american-and-i-sell-stuff.html
2. https://www.mooresrowland.tax/2015/06/e-commerce-and-taxation.html

Federal Taxes for online sellers is pretty straightforward but State taxes are much more complex.  Now the net is being cast so wide that once you sell any physical product in the United States, there's a good chance that you may need to be filing, collecting or paying State Sales / Use Tax.  Cookies, click through, and passing certain sales thresholds could now trigger tax filings.  Please check with a Qualified Tax Consultant for professional guidance.

Images courtesy - Joni Johnson-Powe, JD, CPA