if you actually paid 56K you should be able to submit documents to IRS proving that. That's what the live agent will tell you. so, after procuring documentation, credit card statements, cancelled checks, W-2's. etc write back to the IRS at address on notice saying they are wrong and that you did pay 56K . also list documentation included and amounts to support the 56K
such as
w_2 withholding $40,000
check # 266 $16,000 (front and back)
keep copies
mail to address in notice and get proof of delivery.
