I sold the rental property in May 2018. Do I need to pay taxes on gain 2018 or I can wait till I file return in 2019? Also how do I estimate taxes on property sale?

[N4Nguyen]

@Critter-3 Our investment house was sold on June 7th, so the California estimated tax is not due on 6/15/22 but 1/17/23?  Thanks!