You will need to contact Netspend via their customer service department to obtain the routing number and account number specific to your account and if they will accept a direct deposit from the IRS. Also some prepaid cards have a limit on how much can be deposited from a tax refund.
TurboTax will ask how you want to receive your refund, choose direct deposit. Enter the bank account and routing numbers specific to your card, and indicate it is a checking account.