No Title
You need to take appointment for dropbox service via website
http://www.ttsvisas.com/
documents needed : DS156 Form
Passport
I 797 (h1 approval)
I 129 (h1 petition)
LCA (Photocopy)
2 Photos
Degree/Diploma (Photocopies)
Marrige Certificate (Photocopy) for H4
Fees (see website)
Letter from Employer
Paystubs
Bank statement
see website for details.
I hope this helps. It takes approx. 7-9 working days to get ur passport back.