My understanding is the current exam is
3V0-21.18: Advanced Deploy vSphere 6.5 Exam
However I am wondering on May 1st,. 2020 if the below exam will be released.
Advanced Deploy VMware vSphere 6.7 exam (3V0-22.19)
This will provide clarity if i should be studying for vSphere 6.5 or 6.7
No news yet - keep checking here: Certification Archives - VMware Education Services
Either way, there is usually a crossover period where both old and new exams are available.
Plus, if you complete the requirements for the certification in the 2020 year you will earn the 2020 "version" regardless of whether it's the current exam or any new version that you pass.
Another factor to consider is that finding a testing centre which is open could be tough right now, and at this precise moment there is no remote option available for proctored exams.