In our country, the goverment will deduct from taxes in 3 years 75% of the invest in equipment in renewable energy proyects. Can you tell me how can I include this amount in the project using Homer?  For example, if you invest en PV panels, US$100,000.00.- You can deduct US$25,000.00 every year the next 3 years from taxes.

You can account for them yourself with a little post processing:  Double click on system in Optimization Results to make the Simulation Results window appear, then switch to the Cash Flow tab and click the Details button in the top right corner.  Right click on the cash flow table to export it to a file or copy it to the clipboard, then bring it into a spreadsheet and make any adjustments you wish.