 The annual tax holiday is coming back to Oklahoma next month. Radio Oklahoma's Del Forbis has a preview. August 2nd through the 4th, consumers can avoid paying sales taxes on some items. This originally started to help families getting ready for the start of school. Clothing and shoes costing less than $100 will be tax-free. A complete list of the items that are tax-free can be found on the Oklahoma Tax Commission website. The annual back-to-school sales tax holiday dates back to 2007.