Get your taxes done using TurboTax

To delete dividends in TurboTax Online, enter dividends in the Search box, and click Jump to dividends.  You should be able to delete the duplicate amount from there.

If not,

1. Click the Tax Tools dropdown in the left pane.
2. Click Tools.
3. Click Delete a form.
4. Click Delete next to the relevant Form 1099-DIV.

Alternatively, you can

1. Click Tax Home in the left pane
2. Select the dropdown to the right of Wages & Income
3. Select Pick up where you left off
4. On the Your income page, select Edit/Add to the right of your 1099-DIV
5. Select the trash can to the right of the relevant 1099-DIV