My bank received my December 2015 payment before the last day of the month, but for whatever reason didn't credit it till January 2016. Therefore my 1009-INT for 2015 was short $500 and change. I reported the full amount on Schedule A, and attached a statement.
But now of course my 1099-INT for 2016 is too low, so my schedule A amount will be $500 and change greater than the 1099-INT amount. I'm filing electronically for the first time this year, using H&R Block's tax-prep software, but there doesn't seem to be any way to attach a statement. (In a chat session and a phone call, two reps could not even understand the question, let alone help me, and "sorry, no supervisor is available.")
Question: Should I just not worry about a statement, since the amount I'm reporting will be greater than the amount the bank reported to the IRS? I'm asking if it's at all likely that the IRS will flag my return for investigation? If so, I'll file on paper.