We paid NC taxes in full on time. The amount was exactly what TT specified.

We paid our North Carolina taxes in full on time using the amount specified by TurboTax.

 

We just received a $50 underpayment penalty.  Why did we receive this $50 penalty if we had already paid in full? (The amount specified by TurboTax did include a $50 penalty, but the notice received from North Carolina Department of revenue specified an additional $50 Penalty.)

 

thanks for any help!