If your 2017 was rejected you do not amend. Just fix it and add the missing W2 and mail in an Original return.
How to finish a prior year online return https://ttlc.intuit.com/community/prior-year-return/help/how-do-i-finish-a-prior-year-return-that-i-...
Then for 2018.......if you didn't file a 2017 return try using 0 zero for the AGI to efile 2018.
