It says that i filed my taxes but i did not enter my w-2 information how do i fix it

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If your return has been submitted, you should wait to determine if it has been rejected or accepted.

If rejected, you can go back and change or adjust your return to include the W-2.

 If accepted by the IRS, you should wait until you receive your refund or paid your balance due to amend the return.

You will need to print and mail the amendment along with your W-2 (it cannot be e-filed) and allow about 16 weeks for processing.

See How Do I Amend a Return Already Filed?