Figured it our myself after noodling around for 30 minutes all over TurboTax while waiting for a response from TurboTax.
How to find it on a MacBook:
1. On the TOP menu bar, click on the faint "Forms" icon. (Surprise, it works in spite of looking like it's not active!)
What is in the window will change with the list of "Federal Forms" dropping down on the left and the forms display on the right.
2. Go down the list to any item in question. Highlight and click on the item of interest to you on the list. That item will appear to the right of the list for your evaluation and comparison.
In my case, listed below "Schedule B" are the various 1099 forms that could contain "Total Capital Gains Distributions". Clicking on them one by one I found the duplicate.
3. To delete an item, while it is highlighted on the left list and displayed on the right, simply hit the "delete" on your keyboard.
