Thank you so much for your prompt answer.
I am not hurry to pay tax, just worry what would happen if I buy items online and did not pay tax, and will get punished?
In first paragraph of website of http://www.nolo.com/article.cfm/objectID/87F6DD43-E6F2-4DFE-BCDB8E2E85DFF80B/111/277/167/ART/
It says "and even when a site doesn't collect sales tax, consumers are technically responsible for remitting any unpaid sales tax on online purchases directly to their state."
So I felt confused, dose it mean the consumer must pay tax or not necesserily?
Thank you so much, and wish to get your answer again!