Are you referring to the estimated tax payments which are optional if you owed addition tax to prevent an under payment penalty?
1040-ES in 4 equal payments are due on or before April 15, 2019, June 17, 2019, September 16, 2019 and January 20, 2020.
**Disclaimer: This post is for discussion purposes only and is NOT tax advice. The author takes no responsibility for the accuracy of any information in this post.**
