CarolC is correct that most box 14 codes are simply made up by the employer in order to communicate some piece of information to the employee.
We have no idea what "DIS HB" refers to, and do not know why this would affect TurboTax's processing (if indeed it does, since sometimes TurboTax has to change things out of sequence with what you are entering on the screen).
Contact your employer and ask what this code means.