I sold some wine at auction and would like to declare the capital gains on it. I received no tax form from the auction house. Where do I enter it in turbo tax?

[MarilynG1]

You can report your wine auction income in the Investments topic, under Wages & Income (Stocks, Mutual Funds, Bonds, Other). 

Indicate you didn't receive a 1099-B, and whether it was considered a 'collectible'.

Here's more info on Reporting Capital Gain/Loss.