Whether it is necessary to mention address of 10 days trip of Iraq in Part 4 of N-400 which I not remember?

You have to list that you visited Iraq but if this was a temporary visit then the visitor address would not be needed. You have the option of...

Based on that, What are the major differences between J-1 Visa and H-1B Visa

For h1b Is a dual intent visa so that can be less burdensome. It may be easier depending on your situation if you are thinking of adjusting...

As a green card holder, Can I bring her with K-1 visa?

Unfortunately you cannot do so. Are you eligible to naturalize soon?

What are my options in order to get the I-140 approval notice, or how can I retain my priority date?

set up a consultation with a qualified immigration attorney.

There is no way to give you an estimate of time of even that there would be an expedition, You can certainly request it of your congressman/woman....

I’m currently on STEM-OPT, I left my first job on July 31 2015 and started off with new employer on September 1 2015 and reporte

You have to be truthful. I would suggest providing the information so that an accurate petition can be filed.

Talk to a landlord/tenant attorney in Delaware. from an immigration perspective, the undocumented person should not be present in the US.

1) Can we pursue the drop box facility? 2) Should they go in person for the interview?

For a new 10 yr visa one needs to go in person..

Address discrepancy on legal documents for marriage based green card petiton

You should be fine as long as there is a valid explanation.

Is there any other way to show affidavit of support documents beside sponser/petitioner himself,co-sponser and asset?

You can show a combination of assets and income for yourself or use household income of anothet household membet. The affidavit of support can be a...