In the Online products there is no charge for a state return in the Free Edition. There is a charge for the state return in the Deluxe, Premier, Self Employed and Live products. You can review those product offerings here: https://turbotax.intuit.com/personal-taxes/online/
In the Desktop CD/Download products there is a charge for a state return in the Basic product. 1 state is included in the Deluxe, Premier and Home & Business products. You can review those product offerings here: https://turbotax.intuit.com/personal-taxes/cd-download/
