It is entered in the Interest and Dividends sections in TurboTax. Under Wages & Income, scroll down to Interest and Dividends and click Start or Update next to 1099-DIV. You can also search for 1099-div and use the Jump to link to get to that section. Tell TurboTax you will type the info in yourself.
On the 1099-Div entry screen, you will need to check the box that says ''My form has info in more than just these boxes (this is uncommon). Once you place the checkmark in that box, you see the rest of the fields and you can enter the amount into Box 11.