You enter both box 1a and 1b from the 1099Div. Box 1b is only the portion (or all) of 1a that is taxed as qualified dividends. They get taxed as Capital Gains. You have to enter both boxes.
Enter a 1099-Div under
Federal on left or top
Wages and Income
Interest and Dividends
Dividends on 1099-DIV - Click the Start or Update button
Don't enter the bank name and don't try to import it. It is just as fast and easy to manually enter it. At the bottom pick Change How I enter my Form
Then on the next screen pick I'll Type it in Myself