The costs for the A/C unit and the Furnace unit are entered on the Form 5695 Residential Energy Credits.
They are entered on the screen labeled Enter Your Qualified Energy Property Costs.
You enter the cost of the A/C unit in the box labeled Central air conditioners
You enter the cost of the Furnace in the box labeled Water boilers (this box is mislabeled but it is the box for a furnace)
To enter Home Energy Credits -
Click on Federal Taxes (Personal using Home and Business)
Click on Deductions and Credit
Click on I'll choose what I work on (if shown)
Under Your Home
On Home Energy Credits, click the start or update button
