The home team piled on a mammoth 546--8 declared in he first innings thanks to centuries from captain Shubman Gill (126) and KL Rahul (100).
Sai Sudharsan and wicketkeeper Rishabh Pant both contributed 81 while Washington Sundar added a 52 not out as India called time on their batting innings in the second session on the second day.
Afghanistan were then reeling on 113-5 at the close of play before being out for 152 on the third morning with Rahmat Shah top-scoring with 60 while India's debutant spinner Manav Suthar took 6-33 in 10 overs.
Gill then enforced the follow-on and Afghanistan folded like a pack of cards as they were 112 all out in just 35.5 overs as Sundar took 4-36 while fellow spinner Kuldeep Yadav returned figures of 3-30.
The teams will now prepare for the three-match ODI series that starts in Dharamsala on Saturday.
Suryakumar Yadav has been axed as India T20 captain and dropped from the squad while 15-year-old Vaibhav Sooryavanshi received his maiden call-up for the series in Ireland and England.
Sai Sudharsan is set get an extended opportunity to bat at number 3 in India's Test team, according to head coach Gautam Gambhir.
Teenage batting sensation Vaibhav Sooryavanshi has earned high praise from India batting legend Sachin Tendulkar after an outstanding season in the 2026 Indian Premier League.
Mumbai Indians pulled off a heart-stopping victory in the 58th match of IPL 2026, chasing down Punjab Kings' 200/8 with six wickets in hand and just one ball remaining at the Himachal Pradesh Cricket Association Stadium in Dharamsala.
