Turbotax loaded my information from my brokerage firm wrong. It's showing it as a profit but it's a dividend. How do I correct that?

You will need to delete the incorrectly loaded form and I suggest manually re-entering it to ensure it doesn't upload incorrectly again.  You can also manually add your additional account forms.

To do this in TurboTax Online you can follow these steps:

1. Within your return, click on Tax Tools in the black menu on the left side of the screen.
2. Click on Tools.
3. Click on Delete a Form. 
4. Scroll down to your form and click Delete.
5. Under Federal in the black menu bar click Wages & Income to get back into your tax returns.
6. Locate the section titled Investments & Savings and select Edit/Add, then select the dropdown next to Interest (1099-INT) and Edit and/or the dropdown next to Dividends (1099-B) and Edit