Unexpected PA state refund, incorrect interest/penalty calculation

[rh61]

When I filed my 2024 PA state taxes, Turbotax added a $10 penalty/interest fee.  The good folks down in Harrisburg just gave that $10 back to me today.  In my three decades of using Turbotax, this has never happened.  Anyone else noticing mismatches between Turbotax penalty/interest calculations and PA dept of revenue ? 

[HollyP]

Typically, the state will include an explanation for the refund of the penalty/interest payments on the notice. These commonly include a recalculation or waiver. 

[Steerpike58]

I had exactly the same situation with my CA State tax. TT calculated that I owed a penalty of $291, which I paid.  2 weeks later I received a check for $291, without any explanation whatsoever - just a check.  Since the numbers match, I can only assume it's a refund of the penalty. 

It would appear TT is making a mistake on State Tax penalties.