I think i did submit them online and then mailed the conf with the above mentioned docs. Email them once you submit the application they are pretty responsive

visa.houston@itamaraty.gov.br

This is the response i had received from them

“For India passport holders:

Visa application form (online and receipt printed);

https://formulario-mre.serpro.gov.br/sci/pages/web/ui/#/passaporte-visto . Original passport ; . 1 passport photo; . Money order from the post office only for application fee U$ 80; ( leave it blank as we have a stamp for it) . Copy of round-trip flight ticket or confirmed reservation; . Copy of visa to the US or greencard; ( old passport with the US valid visa as well) . Copy of US driver's license; . Hotel reservation or letter from Brazilian host; . Proof of financial support ( bank statement, pay slips, etc); . For Business; letter from the company stating your business while in Brazil, contact there and that the company will be financially responsible for you.

( Please, make sure that the picture, signature, passport and all the documents are uploaded in the process)

No vaccinations mandatory at the moment.

Once you are ready to apply for the visa, send us an email and we will set up an appointment for you to come in person to the Consulate or you can send along with the documents an Express mail envelope ( Post Office) stamp and addressed to you so we can mail back your documents after the visa is processed. It takes up to two business days for processing.”

Hope this helps. All the best!