What is the Maximum withholding allowance?

You can request that your entire paycheck be withheld if you choose. However, the government is not a bank and is not interested in sending you huge checks in the mail at the end of the year. If you give the government more than required, you could get hit with a fine.

I'm not sure I understand what your asking....and I suspect you really don't have much of the topic either.

You may have 100% of your pay withheld, which may be what would be right, or still too little, if you or your spouse have earnings from other sources that aren't having withholding taken for example.

I suspect your trying to ask can you have nothing withheld....

Basically, you can have any amount withheld, high or low, with reason. Many people, (anyone self employed or an independent contractor, etc.), do not have any withholding taken, but they still make regular estimated payments on the future liability. Not having enough withholding taken to qualify as an adequate estimated quarterly payment for the tax that is ultimately due, will mean you will pay substantial penalties and interest (due it intentionally and your beginning to get into the criminal realm), and pay much more than you would have.