CKGS website might confuse you on this point, if you have already started the passport application and saved it.
The only way to go back and see your saved documents is to use their web reference number on the box provided at the BOTTOM of the their website.
This article has now been UPDATED to help you with Cox & Kings.They have collaborated with UPS and Fed Ex and both cost the same i.e. Remember that CKGS does not allow USPS as the option.If you choose USPS for shipping yourself, you will face issues while they try to ship the package back to you later.How to renew Indian Passport in USA after 10 years – step by step guidance for re-issue of passport with Cox and Kings in the jurisdiction of Indian embassy New York.The process is same for others including Houston (Texas), Washington DC, Atlanta (Georgia), Chicago (Illinois) and SFO (San Francisco, California) Indian consulate.