After you file

2018-2019 online are no longer supported so these files can't be opened

they are not the actul w-2s but what you entered. 

however there are two sources for W-2 info

IRS W-2 transcript

https://sa.www4.irs.gov/secureaccess/ui/?TYPE=33554433&REALMOID=06-00008e4d-63f6-1187-a229-7c2b0ad00... 

or pay the Social Security Admin for copies

https://faq.ssa.gov/en-us/Topic/article/KA-02501