Travel in the US while pending STEM OPT?

that should be fine -- carry your I-20, passport and receipt showing STEM extension is pending.

How much time on average it takes from applying N-400 form till I get the citizenship in Kirkland, Washington

I am not sure if you are in the Spokane District 4-12.5 months) or Seattle (14-15.5). These times are posted under USCIS processing times/ N-400...

I-485 ready for interview but I-130 is pending as well as I-765, what can I do to get EAD ?

Was your Priority Date current when you filed your I-485? Work and travel permits are taking 4-5 months.

How can I my nationality?

You can dream but the easiest ways to come here are to find a U.s. employer willing to sponsor you or to invest $100,000 into a business you will...

Can I travel outside US for 60 days trip every year for 5 years if I apply for citinzenship in next 5 years.?

Must have 913 days physically in the U.S. with no breaks (time outside the U.S. of continuous 180 days or more).

Do those having green cards need to preserve their prior F1 and/or H1b documentation or can I throw them away?

perhaps save electronically and then get rid of them or save until you become a U.S. citizen.

Should i file i-130 now and i-485 later?

i would file them both now if you can remain here until you get your travel permit.

115 days and No oath Ceremony, What is the next Step?

Continue to wait and check periodically or file a lawsuit in Federal Court.

What is my current immigration status?

You have no status. You are in a period of stay authorized by the Attorney General. We recommend to our clients that they maintain an underlying...

Selected as the best answer

It should be ok. Even if rejected you can re-file with a Declaration asking they excuse the late filing and give a reason why you filed late.