Where can I enter a capital loss when it doesn't show on those boxes on the 1099-DIV form?

[mlyeh1]

However, I did have several thousand loss under the net gain or loss section under Summary.

[DoninGA]

Capital losses are not reported on a Form 1099-DIV. 

Any investment sales you made in 2023 with either a gain or a loss will be reported by your broker on a Form 1099-B which is usually sent to you in February.

To enter an investment sale -

Click on Federal Taxes (Personal using Home and Business)
Click on Wages and Income (Personal Income using Home and Business)
Click on I'll choose what I work on (if shown)
Under Investment Income
On Stocks, Cryptocurrency, Mutual Funds, Bonds, Other (1099-B), click the start or update button

Or enter investment sales in the Search box located in the upper right of the program screen. Click on Jump to investment sales

[VolvoGirl]

Under what summary?  On Turbo Tax or on a broker summary statement?  Why are you looking at a 1099Div for it?  You might have a consolidated 1099 statement. That will have sections for 1099-Int and 1099-Div and 1099B. You need to enter each section in the right place. So read it carefully and look for headings.... 1099-INT for interest or 1099-DIV for Dividends or 1099B for sales.  If you are using a statement wait for the actual 1099 tax form to come in late January or February.