You may also be able to claim your 529 contributions as a deduction on state tax forms, depending on what state you live in. (protective.com)
Although these are just two examples, there is an array of other state taxes that individuals, businesses and trusts must prepare state tax forms for each year. (turbotax.intuit.com)
And some of these taxes will require you to submit a separate state tax form each year. (turbotax.intuit.com)