You should be able to locate your depreciation information on the Asset Entry Worksheet and/or the Depreciation and Amortization Report. Both forms should be in your PDF, assuming you saved all worksheets.
If you added an asset on the 2018 tax return for your business as a sole proprietor then the amount of the depreciation is entered on the Schedule C Line 13 and on Form 4562. The Depreciation and Amortization Report will be available when you use Print Center and the option for all worksheets.
When you sign onto your online account and land on the Tax Home web page, scroll down and click on Add a state.
This will take you back to the 2018 online tax return.
Click on Tax Tools on the left side of the online program screen. Then click on Print Center. Then click on Print, save or preview this year's return. Choose the option Include government and TurboTax worksheets