It was over 240 year ago when English settlers dumped an entire shipment of British tea into Boston Harbor as a protest to paying taxes.The act of rebellion was one of the escalating factors that led to the Revolutionary War.Shoppers don’t have to go to such extremes to avoid paying sales tax this weekend as Tennessee holds its annual Sales Tax Holiday. The tax-free weekend is from Friday at 12:01 a.m. to Sunday at 11:59 p.m., giving shoppers three full days to enjoy savings.The sales tax holiday comes at an opportune time as Warren County students prepare to return to school next week. Registration is Wednesday and the first day of school is Friday.The tax-free weekend will follow its traditional format and include clothing $100 or less, school supplies $100 or less, and computers $1,500 or less.