The Indian visa application process is outsourced to private processing agencies in most countries. You will need to submit your application to the relevant agency in your country, NOT to the Indian Embassy or Consulate.
In the United States, Indian visa applications are handled by Cox and Kings Global Services. In Australia and the UK, it's VFS Global. In Canada, BLS International handles visa applications.
When applying for an Indian Visa, you'll firstly need to complete an on-line application form. See Tips and Instructions for Completing the Indian Visa Application Form. Following this, you'll need to print and manually submit the application form to the processing center, either by mail or in person. Your passport and visa will be returned to you by courier if you elect not to pick it up.
Along with your application and fee, for an Indian Tourist visa you'll need to submit your passport that's valid for a least six months and has at least two blank pages, a recent passport-sized photo (check the requirements as it changes, the current requirement is a square photo 2 inch x 2 inch), and details of your itinerary. Copies of flight tickets and proof of residential address may also be required. Your visa application form may have the space for Indian referees, but this section usually isn't necessary to be completed for Tourist visas.
All foreign nationals entering India are required to possess a valid international travel document in the form of a national passport with a valid visa obtained from an Indian Mission or Post abroad.
All Individual visa seekers are requested to apply for the Indian Visa through Online application link , in order to make an application for getting the Indian visa.
The duly signed physical copy of the application form completed in all respect and submitted successfully, is to be submitted at the concerned Indian Visa Application Center (IVAC) or directly to Indian Mission/ Post, on the scheduled date of interview along with the requisite supporting documents. The instructions for filling the form and scheduling the appointment can be seen at Instructions for Regular Visa Application. Important technical information for filling online Indian visa application can be referred at Technical Instructions.