sthamago

then you can follow to what your attorney says

Are you working for the same client before the work location change and after? Also does the old work location and new work location are in same Metroplitan Statistical Area?

You can go out from USA but while returning back you need to go for stamping. And as you said you applied for amendment you can go only for stamping once the amendment is approved.

if the question says any rejections in last 5 years and if it is yes then yes else no. all questions in ds 160 are straight farward

when you attend for F1 Visa and you got refused to get the visa then you need to enter that information while filling the DS 160 now

when the question says "Do you have any earlier Visa rejections" it means when you attend the visa stamping at consulate and got rejected in your passport.

If that question is asked you need to say yes and what ever is happened in your situation

what ever you are getting right now.

1) You need to provide the Vendor letter which has your name stating that your actual employer is your employer name 2) Salary can be more than LCA but not less 3) Each I 797 is each H1B

Good Man. You are the Man. Awesome work. your post is Bridge between US and Canada. :-)