Glad to see some response to this question because I had the same experience despite successfully filing in previous years.
I took a slightly different approach; hopefully it will be enough to avoid having my return rejected. While I was not comfortable entering an amount in any of the boxes without understanding implications and did not have a "Box 13" or anywhere obvious to enter an account number. I did a couple of other things:
1. I removed the "ZIP +4" information from the Payer's ZIP code on one of the 1099-Rs so there are only five digits.
2. I changed the name of the Payer name just slightly (e.g., changed "Company" to "Co."
I won't know if the return was accepted until tomorrow, but I'm hopeful these minor differences will avoid the false rejection behavior.
