Visitor VISA B1/B2 for USA can be issued to you via different ways.If you are renewing your VISA which has not expired and you need to apply in the same category as already issued to you,it is a relatively easy process.Let me guide you into the intricacies of B1/B2 renewal.First you need to fill the DS 160 form available at ustraveldocs.com. They shall ask you a lot of questions regarding yourself and your travel to USA.Answer all questions with honesty.Chances of renewing your VISA are brighter if one has travelled to USA a couple of times and hasnt over stayed.Also make sure you mention even the approximate time/date of time to USA in near future,even if you are not certain ,give them a rough estimate.It is a long form ,fill it with patience and satisfaction as it shall go a long way in issuing you the desired VISA.After you have filled the form DS 160,submit the form after you have electronically signed it.It shall also ask you to keep a passport sized photo ready but it depends if it shall need the same to fill the DS 160 form or not. ,dont worry if it doesnt ask you for the same while filling the form.After submitting the form,it shall give you a couple of confirmation numbers to print out,so keep them with you for future reference.Make an account ,a separate account on ustraveldocs.com using the same email id as previously mentioned in the DS 160.Save the username and password and keep them with you.Now enter that username and password and create/update your profile using the same credentials as used in DS 160.Keep moving forward in filling the form page by page after updating the profile .It shall ask a few questions from you in order to make sure if one is eligible for dropbox/interview waiver etc.Now this is an important step of the process.Make sure before hand ,that if you want to be eligible for dropbox/interview waiver read the couple of instructions as mentioned on the website ustraveldocs.com before filling the forms and also make sure your current VISA is still valid untill the DATE you deposit the needed documents at the dropbox site,if at all you are worthy of dropbox facility.Towards the end of the form it shall ask you to pay the fee and enter the receipt number upon which you can pay the fees through required media ,however you deem comfortable,though all options to pay the fees are mentioned on the website.It takes somes 24–48 hrs for the fees to confirm the receipt number,so kindly wait.But keep checking the status of your payment,once done enter the number and complete the form.If you or any of your family members are applying together under identical criteria in the same category/same conditions you can apply together as well as an option for the same is present in the form.Also you can apply separately,no worries.Now,you can drop off the required documents(make sure you carry the required documents as mentioned on the site or in your email-passport/passports,photo,DS 160 confirmation,bank receipt etc.) to the drop off locations.The drop off locations are mentioned on the website ustraveldocs.com and one can go and submit the documents easily. Also it is not necessary for the applicant to be personally present to deposit the documents. Any person with govt. id (aadhar card,driving license) can go and submit the documents for the same.Untill this date/ day of submission of documents,your VISA has to be valid for effective process and good chances of renewal.It shall there after take 3–5 business days for further notification in case you are still needed for coninterview or not,but in most cases if your DS 160 is correctly and honestly filled ,there occurs no problem.Also the VISA center shall hand over to you a document for you to keep it in safe.That is pretty much all in all in the process of renewal of US VISA in your parent country from where one previously got his/her VISA issued in the same categoryI Hope you find useful and handy.