I was approved for loan advance but it did not post to my Credit Karma Card

 One of the options you can select when you are ready to file is to get a refund advance loan,   

You do not receive any money until your e-file has been accepted by the IRS

https://turbotax.intuit.com/refund-advance/

How will I know if I’ve been approved for a Refund Advance?

You should receive an email from Credit Karma when your Refund Advance funds are deposited. 

If your Refund Advance is denied, you should receive an email from First Century Bank (the bank issuing the Refund Advance loans) letting you know.