Why hasnt my application fee for i-130 been cashed as I sent it more Than two months ago.

Based on this information, it seems that your application has not been accepted and has been rejected and will be returned.

Documents requirement for GreenCard holder's Spouse visa ?

Read the instructions to the I-130. She might be able to visit, depends on whether they believe she is going to temporarily visit and return to...

Can I apply for a work permit while visiting on a b1 b2 visa?

theoretically yes, but the question is based on what? its not easy to obtain work authorization, very few categories depending on your education,...

Can I work on a GC EAD even though I have a valid H1B for 2 more years...?

You don't have to keep working on your H1B or get another job. You can start working using your EAD as soon as you have the card in hand.

I married an immigrant who is no longer in the country our marriage was never reported to INS is my marriage legal?

Immigration status has nothing to do with whether a marriage is legal. If you married in the US after receiving a license, you are married.

Is it normal H4-EAD (I-765) processing much longer than normal ?

Yes it is normal now for them to take this long.

You can obtain an ITIN number, thats fine. You may need another Employer Identification Number for the E2, but thats something you need to discuss...

Startup during OPT/H1B while working fulltime job?

You can start your own company but it must sponsor you for the H1B. You can also be self employed on OPT but it has to be full time, not part...

I have a B2 stamped along with entry date but untill date how long can i stay in usa?

Typically it is 6 months, look up your online I-94, https://i94.cbp.dhs.gov/I94/#/home

What can I do I'm a greencard holder only my fiance can visit here as a tourist?

She can try, but they have to believe that she is not going to stay, get married and adjust status in the US. They may not ask any questions...