What documents exactly USCIS want by asking for a complete federal income tax return submitted to the IRS for recent tax year?

A complete return means everything you filed with the IRS. If they claim that wasn't complete you should ask why.

If I purchase a House and the tax assessment is wrong with the city am I entitled to the back taxes or is the previous owner.

This is not a tax question but a real estate question but I can answer that for you. Once you close the house is yours and you have no obligation...

Can I claim my grandmother as a dependent on my tax file?

The tax question, of whether you may claim your grandmother as a dependent on your return, is one of support. The test is whether you provide more...

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What determines "income" for calculating SEP IRA contributions within S-corp when owner is sole employee/share holder?

Don is correct. The calculation of the SEP-IRA is based upon your earned income (wages) so if you wish to make a larger contribution, you need to...

Yes an employer can ask for verification of financial information about your earnings before you are hired but really this is an employment law...

Will the IRS prosecute for this situation?

It's unlikely you will suffer more damages than interest or penalties for having too little taken out but you should correctly complete a new W-4.

What can i do about Mass. Dept. Of Revenue attempting to collect money they now claim i owe from taxes filed in 2001 and 2003.

You need to immediately hire counsel to defend you against the IRS. I wrote an article about their collection well past the statute of limitations...

Can the father of my child claim the baby on his taxes if he didn't sign the birth certificate but supports us.

The birth certificate is not relevant for the tax return but there are tests for who is allowed the dependency deduction.

Breach of Fiduciary Responsibility by Board of Directors

Your story is a sad story & it sounds like you are in a safe position but I don't understand exactly what you seek from this forum?

Does the gift receiver / donee (real estate value 80K $) had to report any gifts received on his tax returns.

No, the donor reports the gift. Your basis in the RE is the same as the donor's.