When can i apply for US citizen? as of now how long processing from start to finish apply in michigan?

Probably from April 2015, assuming you meet the requirements to do so.

You can leave it blank or write "n/a"

What's the process to get an inadmissibility charge on the grounds of possession of less than 30g of marijuana waived for f1?

You request the waiver at the consulate when you apply for the F1 visa. It can take 6 months or more to process.

I entered the US as a visitor and filed an I-485 Adjustment of Status. What is my current legal status in the US?

A pending I-485 application does not give you a "status," as that is defined in immigration law, so unless you have another status you do not have...

How long will the process take for me to get the green card if my priority date is May 15, 2017?

You can find the most recent Visa Bulletin here. You will want to review the Family 1st preference category for your country. However, if you...

My girlfriend is a u.s citizenand I m Indian before marriage she wants to live with me can I get u.s visiter visa

The K-1 fiancee visa might be more appropriate.

I m Indian citizen and my girlfriend is u.s citizen can I get visiter visa for live in relationship for some times

While technically possible to obtain a visitor's visa to visit your girlfriend in the U.S., it will be difficult to get one to live here with her...

Where can I find information regarding completing a degree under a TD visa?

https://www.ice.gov/doclib/sevis/pdf/Nonimmigrant%20Class%20Who%20Can%20Study.pdf

I130 approved i485 denied for admitting to claiming to be a US citizen for looking for a job, What options do I have if any?

A false claim to US citizenship, for any purpose under state or federal law, triggers a permanent unwaivable bar on admission. This includes...

Eb3 vs Eb1

It is good to have options. You should discuss this with the company's attorney to see what is best. It may be best to either file a new I-485...