I’ll go to the dentist’s as soon as I have (no future!) a toothache.
What a mess! Your mother will be angry when she comes back. (no future!)
I’ll stay at home until you phone me. (no future!)

Sentence : Counting of votes will take place on May 23, after all seven phases of voting are completed.
Here When condition (seven phases) is used in future tense, and comes in the middle of sentense then 2nd part of sentence is written in present tense (here passive voice). But if ‘when’/untill/as soon as keywords arrive at the starting of the sentence then in the end future present then will be used in the second part.
eg.
When tears are in your eyes I will dry them all. (Paul Simon)
As soon as you meet Janet, you will love her.
Until you are eighteen, you will not drive a car.