Double Taxation

One insurance company, UnitedHealthCare, always sends out credit payments to us.  That means we have to mannually enter the card number and the amount of payment in the credit card app, Square.  When it comes to file the tax return, UnitedHealth sends us the 1099-Misc and the Square also sends us a 1099-K. The amount of payments on 1099-Musc (from UnitedHealth) is also reported on 1099-K (from Square). That means the icome is reported twice and we are double taxed.  How can we fix this to avoid DOUBLE Taxation?   Thanks for the help!