Filed tax forgot second W-2

I have filed my federal and state taxes but forgot a second W-2 that I had and on Turbotax it says my returns have been accepted but will not let me amend them online even though it says I can do so.

Does there need to be a Turbotax 2019 program, can I not use the 2018 program?

I have never had this happen before.

Thank you for any help in advance.