support documents for visitor visa in chennai

[soundara]

hi

My sister, her husband and daughter are planning to visit with us for a month.
She has asked me to send the required supporting documents. can u please
tell me what documents i should be sending and also the links to get all
the forms? They will be applying in chennai, India

Thanks

[immihelp]

read https://www.immihelp.com/usa-visas/visitor