How soon should I file AC21?

[Sethumadhavan]

Can I file AC21 letter with USCIS with in a month of joining the new employer?

Thanks for your suggestions

 

[Sri4GC]

Can I file AC21 letter with USCIS with in a month of joining the new employer?

Thanks for your suggestions

That should be fine. Do it ASAP. You may want to refer to the below thread.
http://www.murthy.com/news/n_risres.html

 

[tombaan]

ther are two opinions on it

i for one feel you dont need to file

 

[In_durham]

I too feel it is absolutely not necessary. One will unnecessarily trigger a 485 interview. AC21 allows you to change jobs - there are no forms nor requirements to file. Attorney's will be happy to make 1k to 'file'.