Pheutonsling is the adjacent town to Jaigaon on Indo- Bhutan border where you need to take permit to enter Bhutan.
(Either Passport or Election ID will suffice for Indians; Pan and Aadhar card not accepted for 18-65 age group)
Entry is free for Indian, Bangladeshi and Malaysian tourist. Other tourists have to pay $250 per day which includes permit, food & lodging and traveling.
(Note- Bhutan doesn't promote tourism)
Here you will find agents who will offer their vehicles based on your group size and budget. They will also help you in finding hotels, but cost will inflate due to secret commission from hotel.
Travel from Pheutonsling to Thimpu takes 6-7 hours comprising of ghats from start to end. You will climb one mountain and then descent and again start with another mountain till you reach the destination. Because of the constant turns, the journey can be tiresome.
During journey you will see breathe taking mountain landscapes, but no need to worry even if you miss clicking pictures, as throughout your stay in Bhutan; mountains landscapes are the only constant
Spend the night relaxing in the hotel