According to the law of American states, for orders shipped to below states are subject to sales tax, including states tax and country/city sales tax. Aliexpress is required by law to collect sates tax and remit to these the relevant local tax authories.
The states which are required by law to collect states tax include (updating) :
Washington state– From 1 October 2018
New Jersey state,South Carolina state– From 1 November 2018
Connecticut state,Iowa state– From 1 Janury 2019
South Dakota state– From 1 March 2019
Columbia state,Nebraska state– From 1 April 2019
New York,Idaho– From 1 June 2019
Rhode Island– From 27th, June 2019
Arkansas, Pennsylvania, Wyoming, Idaho, Indiana,New Mexico, Vermont, West Virginia, Kentucky,Virginia — From 1 July 2019
Ohio– From 1 Sept 2019
Arizona, Minnesota, Utah, California, North Dakota, Colorado, Maryland, Texas, Nevada, Tennessee, Wisconsin, Massachusetts– From 1 Oct 2019
Maine– From 1 Nov 2019
Alabama, Oklahoma, Kansas– From 1 Dec 2019
Hawaii, Illinois, Michigan– From 1 Jan 2020