Thanks for your input. I have found a spot on Schedule 3 to show repayment of AdvCTC payments. Using 1040/1040SR Worksheet, information is entered on "Other Credits and Payments Smart Worksheet" Line H. It then is transferred to Schedule 3, Line 13z, and Form 1040, Line 31/32. This counter balances what went on Schedule 8812 and received via Letter 6419. Any "red flag" raised by having different amounts on Schedule 8812 and Letter 6419 is eliminated. This was my objective. Supporting Documents for Schedule 3 and Form 1040 hopefully will answer all IRS questions that will arise when e-filing.
