Green card and sponsorship.I am German

You should consult an Immigration Attorney familiar with family issues. There are too many complexities and unanswered questions for this forum.

GC and H1 paralel?

They are two separate processes-you can initiate both at the same time.

Change of Status from OPT to H4

Just explain in the RFE that she did not find a job and that is why you are requesting for Change of Status to H-4.

Can we travel to US on H1b before october?

The earliest that you can enter the US on H-1B is 10 days before the H-1B Visa is effective.

Selected as the best answer

Whom to address the letter in RFE

So long as you send it to the right address and address all the issues in it-you should be fine.

Will I be eligible for a B1/B2 ??

Have evidence that demonstrates your ties to your home country-this will help in establishing non-immigrant intent.

I am on 6th year on H1B visa and my h1b is ended on may2012, my company h1b holder company was applied for GC on jan2012.

Attorney Schmidt has summarized your position accurately. Having USC kids at this point will not help.

How much would it cost for me to sponsor an H-1B transfer?

Apart from the USCIS filing fee, the costs depends upon the complexity. Attorney's fees can also vary. You may have additional expenses if a RFE...

H1b-h4-h1b COS

They do not have to wait for the H-4 to be processed-but the status of the H-4 will depend upon how the new company petitions for you-whether as an...

My h-1b renewal denied on 31 jan12 and my i-485 dates became current on dec 2012. my question is now what should i do?

You must consult an immigration attorney ASAP. You can file your I-485 only if you are maintaining valid status.