You won’t pay any federal or state income taxes on your 529 college savings plan account earnings if you use them to pay for qualified higher education expenses. Qualified higher education expenses include tuition, fees and certain room and board charges, among other things.
Contributions to a college savings plan aren’t deductible for federal income tax purposes, but some states allow their residents to deduct contributions from their state income taxes. Check with your state to determine what limits currently apply.