Most W-2 imports require entering information from the W-2 to identify you and confirm that you have the actual W-2 in hand.
Why don't you have your W-2? Employers were required by law to get it to you by Jan 31, 2018. Contact your employer for a copy.
**Disclaimer: This post is for discussion purposes only and is NOT tax advice. The author takes no responsibility for the accuracy of any information in this post.**