I don't have my last pay check stub and I need it what do i do?

Well ask your employer for a copy I guess. But, you certainly don't need it for tax return filing...IT CANNOT BE USED FOR THAT. You need the W-2 form, which should be coming along soon anyway. If your thinking of using a W-2 to file...meaning know it or not, your probably getting involved in a Revenue Anticipation Loan (or RAL), see discussions here and other places....which are a complete ripp off and are trying to be outlawed as taking advantage of the needey. Don't do it. Form W-2 and Form 1099-R (What to Do if Not Received)

If you do not receive your Form W-2 or Form 1099-R by January 31st , or your information is incorrect, contact your employer/payer. If you do not receive the missing or corrected form by February 14th from your employer/payer, you may call the IRS at 1-800-829-1040 for assistance. You must provide your name, address (including zip code), phone number, Social Security Number, dates of employment, your employer/payer's name, address (including zip code), and phone number. The IRS will contact the employer/payer for you and request the missing form. IRS will also send you a Form 4852 (PDF), Substitute for Form W-2 or Form 1099-R. (SEE LINK BELOW) If you do not receive the missing form in sufficient time to file your tax return timely, you may use the Form 4852. If you receive the missing or corrected Form W-2 or Form 1099 after you file your return and a correction is needed, use Form 1040X (PDF), Amended U.S. Individual Income Tax Return. For additional information on filing an amended return, refer to Topic 308, Amended Returns. PROFESSSIONAL OBSERVATION BY Wiki: EXPECT THIS TO DELAY YOUR RETURN ROCESSING A BIT. HOWEVER, NOT DOING SO WILL CAUSE MORE PROBLEMS & DELAYS THAN YOU CAN IMAGINE!