No, special documentation like visas is not required for Indian citizens travelling to Bhutan. However, there is a process to follow to enter the country:

• Entry Permit: Upon arrival at land borders or Paro International Airport, you will need to obtain an entry permit from the Department of Immigration.
• Valid Travel Document: Carry either your original passport with a minimum validity of six months or your original Voter ID card issued by the Election Commission of India.
• Additional Requirements: Two passport-sized photographs. Travel insurance valid for your entire stay. For children under 18, their original birth certificate (in English) or passport, along with a legal guardian if not traveling with parents.

Here are some resources from the Indian Embassy in Thimphu, Bhutan for your reference:

• Travel and Tourism - Embassy of India Thimphu,Bhutan [Indian Embassy in Bhutan on Embassy of India Thimphu,Bhutan]
• Indian Nationals Travelling to Bhutan - Ministry of External Affairs [Indian Ministry of External Affairs on Embassy /High Commission /Consulate General of India]