I am supposed to receive 3 W2 forms. I have received 2 and filed for tax return already on those . When I have the 3rd one can I file for return on that one as well ?????

Your tax return is the form you send to the government that shows your income and calculates your tax. The money the government sends back to you is your refund.

You have to report all your W-2s on one tax return. If the tax return that you filed is accepted, you will have to wait until you get the refund from that, then file an amended return (Form 1040X) to add the third W-2.

If the tax return that you filed is rejected, you can add the third W-2 when you correct the reason for the rejection, then resubmit the tax return.

In the future, wait until you have all your W-2s before you file your tax return.