States that do "TAX FREE" week/ends

July

Mississippi: July 29-30. Clothing and footwear $100 or less exempt.
See the complete list of tax-exempt items.

August

Alabama: August 5-7. Clothing, computers, school supplies and books exempt (up to a certain dollar amount).
See the complete list of tax-exempt items.


Arkansas: August 6-7. Clothing purchases of $100 or less and school supplies are exempt.
See a complete list of tax-exempt items.

Connecticut: August 21-27. Clothing and footwear less than $300 exempt. More details.

Florida: August 12-14. Clothing, books and school supplies exempt (up to certain dollar amounts).
See a complete list of tax-exempt items.

Iowa: August 5-6. Clothing and footwear $100 or less exempt.
See a complete list of tax-exempt items.

Louisiana: August 5-6. Most items less than $2,500 exempt.
More details.

Maryland: August 14-20. Clothing and footwear $100 or less exempt.

Missouri: August 5-7. Clothing, computers and school supplies exempt (up to certain dollar amounts).
More details.

New Mexico: August 5-7. Clothing, computers and school supplies exempt (up to certain dollar amounts).
More details.

North Carolina: August 6-8. Clothing, computers, school supplies and sports equipment (up to certain dollar amounts).
More details.

Oklahoma: August 5-7. Clothing and footwear less than $100 exempt.
See a list of tax-exempt items.

South Carolina: August 5-7. Clothing, computers and school supplies exempt.
See a list of tax-exempt items.

Tennessee: August 5-7. Clothing, computers and school supplies exempt (up to certain dollar amounts).
See a list of tax-exempt items.

Texas: August 19-20. Clothing, footwear, backpacks and school supplies less than $100.
See a list of tax-exempt items.

Virginia: August 5-7. Clothing, footwear and school supplies (up to certain dollar amounts).
See a list of tax-exempt items.

I got this from  http://shopping.yahoo.com/articles/yshoppingarticles/649/back-to-school-shoppers-get-a-break-on-sales-taxes/