A waiver absolutely requires assistance with an attorney. Consult with one to discuss further.

My parents are in Pakistan and they have 5 years multiple visit visa, can they travel on visit visa if I apply immigration ?

Yes they may but will need to establish that their travel is brief and only for limited purpose, particularly when an immigrant case is pending.

Yes USCIS May check financial tax returns for an applicant applying for AOS.

Immigration: Does unemployment insurance benefits make you a possible public charge from Immigration's point of view?

No unemployment benefits should not impact subsequent immigration cases.

How can out of status f1 student marries us permanent resident?

You may apply for AOS once your spouse becomes a USC.

You may file with a waiver of the joint filing requirement but best to consult with an attorney to determine best option in your case.

Can we apply for the extension of the stay permit for B-1 visa holder due to COVID-19 situation?

Yes you may although travel may be safer by July. Best to consult with an attorney for review of case.

Yes the petitioner may file for applicant.

Refile with all proper forms and fees. Best to have an attorney review prior to filing.

Is I-944 needed for each family member with I-485 application?

Yes, each applicant for I485 must submit Form I944.