Under Income & Expenses/Rental Properties and Royalties, click "Yes" to answer " Did you have any rental or royalty income and expenses in 2018...." and answer the question about realty professionals. The next screen takes you to the Rental Summary page. Click "Edit" next to the property. On the next screen click "Start" or "Edit/Add" next to Assets/Depreciation to enter the information pertaining to your addition. The cost basis of the addition will be the sum of all expenses incurred for the addition.
Under Income & Expenses/Rental Properties and Royalties, click "Yes" to answer " Did you have any rental or royalty income and expenses in 2018...." and answer the question about realty professionals. The next screen takes you to the Rental Summary page. Click "Edit" next to the property. On the next screen click "Start" or "Edit/Add" next to Assets/Depreciation to enter the information pertaining to your addition. The cost basis of the addition will be the sum of all expenses incurred for the addition.