From IRS pub 946
Qualified section 179 real property. You can elect to treat certain qualified real property you placed in service during the tax year as section 179 property. If this election is made, the term “section 179 property” will include any qualified real property that is:
• Any of the following improvements to nonresidential real property placed in service after the date the non-residential real property was first placed in service.
1. Roofs.
2. Heating, ventilation, and air-conditioning property
Business Income Limit
The total cost you can deduct each year after you apply the dollar limit is limited to the taxable income from the active conduct of any trade or business during the year. Generally, you are considered to actively conduct a trade or business if you meaningfully participate in the management or operations of the trade or business.
the problem I came across was no matter how I entered the info, on a test basis, I could not get the 179 deduction. you may need to talk to support.
irc sec 179 (e)
e)Qualified real property
For purposes of this section, the term “qualified real property” means—
(1)any qualified improvement property described in section 168(e)(6), and
(2)any of the following improvements to nonresidential real property placed in service after the date such property was first placed in service:
(A)Roofs.
(B)Heating, ventilation, and air-conditioning property.
(C)Fire protection and alarm systems.
(D)Security systems.
