I just spoke with the credit card processing company (Square). After 30 mins on the phone and explaining everything, they acknowledged the error. However, they told me it is there policy NOT to correct 1099k forms. They told me I had to address it with a tax professional. So the option to get a corrected 1099k form is out.
As far as a letter of explanation do I just write a letter and put it as the last page on the tax return?
