Please specify which tax forms are you looking?
federal or state - specify your state..
for which year do you need tax forms?
If you are looking for the simple federal tax return - here is the form 1040EZ - http://www.irs.gov/pub/irs-pdf/f1040ez.pdf
Let me know if you need other forms.
Assuming that you meant W-2 or 1099misc forms?
These forms you may get only from your employer who issued the forms.
Some employers provide online access to tax forms - but in order to get access - you need to contact HR person and ask for the web link and password.
That is considered a private information and you will be able to get such information only after your identity would be verified.
Here are some online services that provide copies of tax forms;:
But again - you need to provide identity information that you would get from your HR person.
If you are not able to contact your employer - you may use Substitute for Form W-2
- that is the form 4852 - http://www.irs.gov/pub/irs-pdf/f4852.pdf
Please also review this IRS article - What to Do If You Are Missing a W-2 - http://www.irs.gov/newsroom/article/0,,id=106470,00.html
Please let me know if you need any help.