Copy of all taxes forms from Howard Lumber company?

If you need the W2s you have to get copies from the employer.   Turbo Tax doesn't have copies.  Do you want copies of your tax returns?

How to Access prior year online returns
https://ttlc.intuit.com/community/prior-year-return/help/how-do-i-access-my-prior-year-return/00/27010

If you can't get the side menus to open up to access the prior year..... You need to start entering some basic Personal Info in 2021 for the side menu to open up. Just continue a little ways into 2021.

If you used the Desktop CD/Download program then the only copy is on your computer and not saved or stored online. So you need to make and keep your own backups.

Or request a transcript from the IRS
https://www.irs.gov/individuals/get-transcript

You did not mention why you are trying to prove you were employed.   You may also want to get a work history from Social Security.

WORK HISTORY  https://www.ssa.gov/forms/ssa-7050.pdf