Where can I find the depreciation schedule from 2020 that my CPA is requesting?

Your previous year tax return should include a schedule of depreciation and amortization report called Form 4562 Depreciation and Amortization Report.

If you prepared your 2020 Federal tax return with a TurboTax online product, sign into the correct TurboTax account, select Your tax returns and documents and select last year's tax return for download.  Make sure that you download all tax forms, government worksheets and TurboTax worksheets.

If you prepared your 2020 Federal tax return with TurboTax desktop product, TurboTax does not retain the tax return.  The tax return is saved on the computer hard drive where the TurboTax desktop product was installed.

See TurboTax Help here and here.