I got RSU vested in 2017. Some stocks were sold by broker to cover taxes as I chose Sell to Cover. My W-2 reflect the net value. Do I need to file 8949 form?

I have already filed 2017 returns so do I need to amend it as I did use W-2 and did not use 1099. I was in impression that since RSU net amount is included on W-2 so I don't need anything else to report.