Presidential elections will be held in Afghanistan in 2019. It was announced on July 31, 2018 that the election IEC had made April 20, 2019 the date for the next Presidential election.
Sources and further reading:
, Clearing the way for fair elections
https://www.chathamhouse.org/publications/twt/clearing-way-fair-elections
Afghan Leader Sees No Change Toward Taliban From Pakistan
Afghanistan plans to hold presidential election on April 20 next year: source