Contesting late fee and interest. Seeking advice.

I am at the understanding that a reasonable excuse for contesting late fees and interest is that it is an unforeseen circumstance.  In my case, I have ALWAYS, for over a decade, received a refund and did not think I needed to pay anything on April 15th when I filed for an extension.  

 

When I finally finished my taxes in early October, I discovered that I owed for 2024.  So, I just paid the amount ($8.8k), assuming this would probably generate paperwork from the IRS to follow up on late fees and penalties, where I could contest it under the unexpected rule.  I set up electronic filing and payment through TurboTax.

 

BUT, there was a problem with the TurboTax software.  TurboTax kept saying there was a problem with my electronic return.   After days of not finiding resolve with tech support before October 15th, a TurboTax support person told me to print out my return and mail it in.   I did this and included a $8.8k payment via mail.

 

Weeks later, I got a $8.2k check in the mail from the IRS with no other paperwork included.   I checked the IRS site online and learned that along with my mailed payment, Turbotax eventually also sent in my electronic payment and my total payment was 2x $8.8k!   Good thing I had the money in the account to absorb the double payment.  

 

Now I have to try to get my $600 back, and I'm feeling at a disadvantage because they already have my money.     

 

Sorry for the long story, but I am looking through the IRS website and getting ready to contact the IRS for the proper process.  

 

Any Advice or direction from the forum is appreciated.   Thank you in advance.