In general, it's a good idea to keep receipts for improvements on your home. With those receipts, you can determine the best tax plan with your accountant.
If you happened to replace some windows or exterior doors in 2015, you may be entitled to a tax credit.
-For doors, you can get up to a $500 credit.
-For windows, you can get up to a $200 credit total but not per window.
Unfortunately, installation costs aren't considered. Combined, you can claim 10% of all expenditures with the limit to $500 for all energy improvements combined.
The IRS form 5695
Overall, it's a good idea to hire an accountant to handle ensure you are filing your taxes correctly. They will likely help you find deductions that you didn't know about and protect you from audits.