Marvin Tax Credit Qualification
Older windows and doors were replaced with more energy-efficient Marvin window and door products that are recognized as ENERGY STAR qualified products. Almost all Marvin products are labeled ENERGY STAR.
All windows and doors must have been installed by December 31, 2013.
Save the purchase receipt and all NFRC/Energy Star labels from the windows and doors installed.
Print the Manufacturer’s Certification Statement needed for the tax credit.
http://www.marvin.com/new-construction-remodeling/tax-credit/