Where do I enter capital losses on stock investments?

[MayaD]

Enter your 1099-B Proceeds From Broker and Barter Exchange Transactions form and TurboTax will calculate your losses. 

Where do I enter or import a 1099-B?

If you sold at a loss, you can offset that amount from your overall gains, reducing the amount you’ll be taxed on. If your losses are more than your gains, you can deduct a net loss of up to $3,000 ($1,500 if married filing separately). Any capital loss you couldn't deduct this year can be carried forward and deducted on future tax returns as a capital loss carryover.