You can import most 1099 info. Capital Gains are on 1099 Div and 1099 B and maybe 1099 Int. What are your Capital Gains from? If you have sales you enter the Sales price and cost and then Turbo Tax calculates the Gain or Loss.
Importing 1098 &1099 forms to Online version
https://ttlc.intuit.com/community/entering-importing/help/how-do-i-import-my-1099/00/26254
