Don't understand why you're being requested to download a PDF of your 2019 tax return, when it's apparent you did not use TurboTax to complete and file your 2019 tax return.
Bottom line is, you need a few forms from your 2019 tax return. Without them, you have no way of definitively determining depreciation amounts and methods used.
In your 2019 tax return look for two IRS Form 4562's. The two you need will both print in landscape format. One is titled "Depreciation and Amortization Report" and will have everything you need on it, for correctly entering those assets into the TTX 2020 program. The other is titled "Alternative Minimum Tax Depreciation", and if information is needed from that one, the program will ask you for it.
Next, if your business has any carry over losses (it probably does not, but just in case) there will be an IRS Form 8582 in the 2019 package. You will need that so you can deal with any such losses (if necessary) on your 2020 tax return.
Without at least the form 4562's, you may be stuck. However, it's perfectly possible to "figure it out" if you have those two 4562's from any prior tax year, *and* they have all the assets currently used in your business listed on them.
