The MAF/TIGER Partnership Software (MTPS) is an easy-to-use desktop tool provided by the Census Bureau along with the address files that would make participation easier for juristictions without a GIS system.
When registering, you either choose the MTPS, shapefiles or paper maps. If you already have a GIS system in place, it is probably in your best interest to choose shapefiles.
For communities already using ArcGIS, a no-cost extension will provide a toolbox of census-specific workflow tasks (incorporating business rules and data validation), and output a revised shapefile in the required census format. This extension, developed by ESRI and Citygate GIS, aims to replicate the task and technical functionality of the MAF/TIGER Partnership Software (MTPS) in an ArcGIS environment.
The Proximity CommunityViewer software features ease-of-use as a top priority and is an option for users with limited or no GIS experience. The basic version is free to LUCA participants, with additional features (including geocoding address data) available for a fee.
For the Census Bureau to successfully process a shapefile, the participant needs to update the shapefile originally provided by the Census Bureau.
You need a GIS and some knowledge of how to manipulate spatial data to use them. Make friends with your GIS coordinator, and make sure they understand LUCA program requirements.