TT does not have your documents. you have 3 options
1) contact employer
2) contact Social security Adm - there is a fee
https://www.ssa.gov/agency/contact/
3) if transcripts will do - federal only info no state info - you can get these from the IRS
https://www.irs.gov/individuals/tax-return-transcript-types-and-ways-to-order-them
