Only 2019 income can be filed on a 2019 tax return. You cannot use your 2014 W-2 on a 2019 tax return.
That W-2 could only be used on a 2014 tax return, but it is now too late to file a 2014 tax return and receive a refund. If you would have received a refund, you forfeited it a couple of years ago. If you owe for 2014, the IRS still wants to be paid. If you want to file a 2014 return then you can get the paper forms from the IRS and prepare a 2014 return to mail in.