I had to replace the central air conditioner on a rental property. Where do I enter that?

The air conditioning unit would be entered as assets to be depreciated for your rental income and expenses. 

Air conditioners are classified as improvements and depreciated over the useful life. See link below, Ch. 2, page 5, Table 1-1 https://www.irs.gov/pub/irs-pdf/p527.pdf

WHERE?

The major screen page headings to enter rental property information.

1.federal taxes/ wages & income/ select specific topics/ rental and royalties/ /view list(then )

I'll chose what I Work on.

continue through to

your rental summary

assets <---------<<<<< here click update

D. Vehicle Expenses

At the property asset summary screen for your property; click the edit..Answer question to set up properly in the tax program

X rental  real estate property

X residential rental  real estate

you now have a 27.5 year property for the HVAC