Yes, if the activity didn't occur until this month (April 2019), then you can being with the 2nd quarter payment in June.
If you want to utilize TurboTax to help you create the 2019 forms, see this answer from TurboTax Anthony below for how to access the estimated tax section of TurboTax after you have already filed your return:
https://ttlc.intuit.com/replies/7220715
