Broadband Deployment Accuracy and Technological Availability Act or the Broadband DATA Act This bill requires the Federal Communications Commission (FCC) to change the way broadband data is collected, verified, and reported. Specifically, the FCC must collect and disseminate granular broadband service availability data (broadband maps) from wired, fixed-wireless, satellite, and mobile broadband providers. To do this, the FCC is required to establish the Broadband Serviceable Location Fabric (a dataset of geocoded information for all broadband service locations, atop which broadband maps are overlaid) as the vehicle for reporting broadband service availability data. Additionally, the FCC must put forth specified requirements for service availability data collected from broadband providers, and it must create a challenge process to enable the submission of independent data challenging the accuracy of FCC broadband maps. The Government Accountability Office must report on identified locations where fixed broadband can be installed to improve the quality and completeness of data sources for the fabric.