Can i start preparing my documents without get answer from USCIS?

You can start preparing documents. Never be sure of an approval until you have the written approval notice in your hands.

I possess B1/B2 - querying whether I need I-539 extension. I intend stay in USA 2-3 wks per month then return to UK for work

if you are here only 21 days or less you do not need to file an extension. However, when your visa in your passport expires you will need to renew it

Where to apply I-485 Application?

Follow the instructions on the form. It is the center which has jurisdiction over where you live not where the file is transferred.

When filing a fiancé visa (K-1), the financial support form requirements?

it is based on the number of people (federal poverty guidelines) that live in your household. A letter from your employer stating your annual...

Each case is different. Proof of living together is key such as photos leases insurance bills bank accounts in both your names are just examples

You will need to find an employer willing to sponsor you in Florida. Consult an attorney to determine all options available to you.

Joint sponsor

Yourco sponsor does not have to live with you. She completes the Ixfs and submits her tax return and proof of current employment

I applied for I-539, My DSO mentioned in her letter to USCIS that I contacted her 2 months after my arrival,will this effect me?

I dont see any problem with you contacting your school 2 months after you arrived

L1B extension denial and back to home country. now want to apply for h4

He should be fine if he has the correct documetns including a current letter from your employer and your H1B approval notice and LCA. it would be...

How much do i have to pay for Application for Naturalization.

Different lawyers in different states charge varying amounts based on experience. There is a filing fee in addition ot a legal fee of $680.00