The tax refund card has nothing to do with your employer. There is an option you can choose when you have that card to get paychecks deposited to it if you want to do that. But you do not have to do anything in regard to your employer just to receive your tax refund on the card.
For help with your pre-paid Visa card:
Call (888) 285-4169
There is a “Help” link in the top corner of the web site for the card:
https://www.turboprepaidcard.intuit.com/