How do I enter a matching amount necessary in a box that won't allow me to fill in an amount? I've already done it correctly on the appropriate form!

It's an 1099-R form asking about IRA RMD: it doesn't look like the form I received, and did not have my RMD #s that I already entered. It wanted taxable amount, which I entered, and then said it couldn't be greater than gross distribution amount, which was not there either and will not let me fill in!