You should receive a Form 1099-B from the brokerage if you sold any stock in 2019. The brokerage usually will send out the 1099-B in late January or early February.
Also, see this TurboTax support FAQ for importing a form 1099 - https://ttlc.intuit.com/community/entering-importing/help/how-do-i-import-my-1099/01/26254
