"You had ABP Interest Adjustment" - Deluxe Required

Hi, TurboTax is saying I need to upgrade to deluxe because "You had ABP Interest Adjustment". What does this mean and where do I find this adjustment amount? Last year I did not need Deluxe and nothing in my financial situation has changed--same job, same bank, same investments, etc.  
My income sources for this return are: W-2, 1099-INT (x2), 1099-DIV.