*YOU* don't figure depreciation. The program does that for you (and correctly I might add) based on the data you enter.
All assets, including the property itself is entered int he assets/depreciation section. You will need the IRS Form 4562's from your 2018 tax return. Both of these forms print is landscape format. One is titled "depreciation and amortization report" and the other is "Alternative Minimum Tax Depreciation". Most likely, you will only need the first one.
When the program asks you for (or ask you to confirm) prior year's depreciation already taken, to get the correct amount, look at the 2018 Form 4562 and add together the amounts in the "prior years depr" column and the "current year depr" column. That total will be the amount you enter in TurboTax 2019 for the prior year's depreciation already taken.
If the property was classified as a rental for the entire 2018 tax year and the 2019 tax year, then the 2019 depreciation should be within a few dollars of the 2018 depreciation taken, if it's not a spot on match.
