Should i wright previous b1b2 denied reasons in new application for apply B1,B2 again?

Were you previously denied for the visitor visa? If so, then you must indicate that in a subsequent application.

It depends on the countries that you are seeking to enter. Consult with an attorney for guidance.

Is It normal for immigration officers to visit my my house?

The fact that you were already approved as reassuring. Home checks are sometimes done in certain cases so this is not abnormal.

I had the interview and I need to show them 5yr of my tax returns the only problem Is that I have only 4yr

You may obtain the IRS transcript which is more than sufficient for this purpose. If timing is an issue, you should write to USCIS about the delay...

CAN I REAPLLY TO ENTER THE USA AFTER VOLUNTARY DEPARTURE FROM IJ WITH NO BAN/BAR ON THE JUDGEMENT NOTICE?

More information is needed about the immigration court case that followed after your denial. Consult with an attorney for further guidance.

I have been in the US for over 2 years but still have a valid visa. Am I able to travel within the US safely ?

Any travel, even domestic, can carry risks as you are currently in the United States without status.

If they were all related to school/work study and were relatively short durations, you can indicate accordingly and provide a breakdown of the...

Adjustment of status application - leave blank or write N/A?

Either should suffice. Refer to the form Instructions for guidance.

I-751 case withdrawn by spouse

You do not need to refile but can request that the case be transferred to a waiver based case. It is best to work with an attorney for assistance.

What address to file for Concurrent I-485 and I-612 (hardship) and I-130

No, you should file each application at the appropriate filing address per the USCIS webpage. Refer to their instructions for guidance.