Once submitted, DS260 cannot be updated. It can be updated only at US Consulate that too on the date of your interview .
Dear Applicant:Has anybody updated the DS260 for IR5 is it was past 1 yr?
Thank you for writing to our office.
We understand that you are unable to use the immigrant visa before the expiry date and wish to know if the visa validity can be extended.
In response to your questions, issued immigrant visas are generally valid for six months or in some cases three months after issuance. If an applicant does not use an issued immigrant visa within its period of validity, a replacement visa may only be issued if the applicant proves to the satisfaction of the consular officer that he/she did not use the issued visa because of reasons beyond his/her control and for which he/she was not responsible.
CR1/2 and IR1/2 applicant’s applying for re-issuance of their Immigrant Visa will need to log in to http://www.ustraveldocs.com/in and select “Consulate Appointments” in order to schedule your appointment at the Consulate.
For Extension of an Expired Visa Applicants should bring the following documents:
• Fees of $325, which must be paid by international credit card or in cash. Please carry exact change if paying in cash. As the consular rate of exchange can change, check it at http://www.ustraveldocs.com the day before your interview to obtain the current consular rate of exchange. Consular fees are not refundable.DS 260 confirmation page
• Two recent photographs (2 x 2 inches)
• Obtain an updated Medical Report (No X-ray films or discs). A list of panel physicians is available at http://mumbai.usconsulate.gov/immigrant_visas.html. Medical reports are valid for 6 months, and in certain cases 3 months. The visa is only valid for the duration of the medical report’s validity.
• Obtain an updated Police Clearance Certificate from the Regional Passport Office. Police certificates are valid for one year from the date of issuance.
Note : Any update regarding the IR5 visa category you will be communicated and you will be receiving a official communication from embassy and then you may schedule a appointment if you haven't received any communication you are not allowed to schedule the appointment.
We hope this information is helpful to you.
Please visit https://www.surveymonkey.com/s/gss_india to share feedback on the services we provide.
Sincerely,
U.S. Visa Service Desk