No you can not use your last paycheck stub to file,you have several options The first option you have is to see if your employer participates in the import program then you can input the EIN and it will automatically import all of your wages and such.If it does not than more than likely your employer does not participate in the program and you will have to wait til you receive your actual W-2.When you receive your W-2 you can also use your mobile device to snap a photo of it and will automatically import it that way as well for you.