Can my cousin file my green card once he become citizen.

Unfortunately, your cousin is not a qualifying relative.

effective date is usually next day 3/19/2016

How much maximum time extension do I have on my H1 B?

An H1B clock is reset by the filing of an H1B cap case. When extending the old H1B you do not reset the clock, but capture remainder time left of...

USCIS locations

it depends upon the basis of the I-485 and if it is a stand alone application. https://www.uscis.gov/i-485

When uscis will ask for the original documents? Or should I send them now?

plan to take originals to the consulate at the interview

Will my new employer be able to file H1 once my current application is approved? OR do I need to wait until October?

you must wait until after your first paycheck in October

So can i still fixs my papers with out him

I recommend you meet with an attorney. You seem to qualify for DACA. You may qualify for other categories.

Which law was in place in 1987 with regard to N-600? Am I eligible if my citizen parent had joint and legal custody??

You may review the chart: http://www.ilrc.org/files/documents/natz_chart-c-2015_3-4.ak_.pdf

Can I file my petition to USCIS by mentioning misspelt names in 'Other Names' or do I need to revise the original documents

We recommend you have the birth and marriage certificates corrected. listing as 'other names' will not apply to this issue.

How can I fix my parents residence status, they are currently immigrants? I am the oldest of five so my siblings depend on them.

Depending upon your status as a US citizen and whether your parents entered EWI or Overstayed and their criminal record, among other things, you...