I recently received a $20 penalty notice from the PA Dept. of Revenue for 2024's tax filing. I suspect this may be an underpayment penalty. I retired the prior year (2023) so I did not have any income in 2024 for which tax was withheld. (PA taxable income was less than $15k for 2024.) If this is in fact an underpayment penalty why did turbotax not pick up on this and alert me to the penalty when I filed so that I could pay the correct amount, including the penalty at that time?
