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Thank you for your response.  My income tax payment was accepted at the end of April.  I paid it via direct debit from my bank account. I have confirmation that payment was received then on turbotax and also via email.  However, I just got a notice of an additional 78 dollars that I now owe that is labeled as a late estimated payment penalty with no explanation given.  Is this possibly because my income state tax owed was higher than a certain amount?  If so, why was I not notified of that via turbotax while filing?