You may use your final pay stub to prepare a substitute W-2, but you won't be able to e-file your tax return. If there is any discrepancy between the substitute W-2 and the actual W-2, you may need to amend your tax return later on.
The FAQ below has instructions for preparing a substitute W-2 (Form 4852) in TurboTax.
I don't have my W-2 https://ttlc.intuit.com/replies/3301808
