199A dividends can be entered in TurboTax Premier (and perhaps other versions) in box 5. To get to box 5, starting at "Dividends on 1099" select "Start" or "Update", then for the line identifying the dividend payer select "Edit" to reveal additional boxes including box 5. TurboTax unfortunately is using one button for the dual purposes of making changes (edits) as well as additional entries (additional 1099 boxes).
