income taxes showing individual persons income

Are you looking for someone's tax return? If it's not yours, you can't get a copy.

 

Oh. In that case:

http://www.irs.gov/individuals/article/0,,id=110571,00.html

If you want a copy of the acutal forms, you may be out of luck. It is vital that you keep copies of your own forms.

BTW, this is for the US only. I assume that's what you're looking for.