If you used TT online then just log in and download the .tax20nn and PDF files for the tax years you need. If you used the desktop version, then the only place you can get it is from the IRS and SSA.
You can get transcripts of all filed *and processed* tax returns for up to three years back for free at https://www.irs.gov/individuals/get-transcript Copies of the actual tax returns are $50 each.
For W-2's and 1099's you can get those from the Social Security Administration. Read the FAQ at https://www.irs.gov/taxtopics/tc159
