You can choose to enter it directly into the capital gains section (not through the K1 by using the steps below. Do not indicate you received a Form 1099B.

While you are signed into your TurboTax account (desktop or online) please see the steps below.

1. Select the Federal tab
2. Select Wages & Income
3. Scroll to Investment Income
4. Select Stocks, mutual Funds, bonds, other > start or update
5. Continue to enter you information - select stocks and enter the name and EIN of the entity on the K1
6. You can use "various" as the purchase date, zero cost basis, December 31 as the sale date.  

• If you have held this investment more than one year you can use long term as the sale category or holding period for long term capital gain treatment..

This will add the capital gains in the appropriate place and provide the correct tax rate on this income.