DOE has amended its Submission Instructions for software to be considered for the DOE Approved Software List for the 45L tax credit. Effective 1/1/2020, in order to be considered for listing on the DOE Approved Software List, software must be validated against either the 2013 or 2016 versions of RESNET’s “Procedures for Certifying Residential Energy Efficiency Tax Credits,” subject to the transition policy described below.