RaviShankar22 said:Even though USCIS claims that it can be filed online, there is a bug in their software and it requires A# which visitors don't have.
Read http://www.immihelp.com/visas/extend.html
No legal advice. Use at your own risk.
waitin_toolong said:what A# are u filling for ext of B1/2 there are no A# assigned for B1/2