I dont have my w2

[allinechan]

I don't know what the withholding is for some of the questions all I have is the last pay stub

[PatrickL]

You will need your full W2 you file your taxes. 

Contact your employer If you have not received your W-2, contact your employer to inquire if and when the W-2 was mailed. If it was mailed, it may have been returned to the employer because of an incorrect or incomplete address. After contacting the employer, allow a reasonable amount of time for them to resend or to issue the W-2.

[allinechan]

The W2 was misplaced

[PatrickL]

You will still need to contact your employer for a replacement or to view it online.

[StacyT]

TurboTax has also partnered with companies where you can download your W2 directly. Here is a list of participating partners, if not listed here, you will need to request a replacement as previously mentioned:
 <a rel="nofollow" target="_blank" href="https://www.partner.turbotax.com/partner_list.html">https://www.partner.turbotax.com/partner_list.ht...>