No. This is not mandatory. This is an option to receive your refund Up to 5 days early. You can choose just the normal direct deposit option. If you need to remove this fee, see the links below to get to the fees section and remove any non-desirable charge
To locate the fees section, view the link below
How do I review my fees in TurboTax Online?
To see why are you being charged or to remove any non-desirable fees, click on the link below
Why am I being charged for TurboTax Free Edition?