getting a copy from your employer is one method another method is to get copies from the Social Security Adm. there's a fee and no telling how long it will take
https://faq.ssa.gov/en-us/Topic/article/KA-02501
another method is to go online and get w-2 transcripts from the IRS - free but no state information
https://www.irs.gov/individuals/get-transcript
