Need to extend my parents visa plsssssss helppppp

[Polasa123]

My Sister has intially provided the supporting documentation for my parents Visiting visa (at the time of applying visa first time), Now I want to extend their visa and can I show my documents as the supporting documents. Please let me know and also how soon should i apply. I am hearing mixed results as to rules have changed we need to apply early.

[immihelp]

Yes, you can.

The best thing would be to apply around 3 months of their stay in the U.S.