Welfare - As introduced, directs TACIR to conduct a study into homelessness and ways to combat the rise of homelessness; requires TACIR to file the report with the health and welfare committee of the senate, the committee in the house of representatives with jurisdiction over matters pertaining to homelessness, and the legislative librarian before January 31, 2027. - Amends TCA Title 4 and Title 71.

HB 2421 directs Tennessee's advisory commission on intergovernmental relations (TACIR) to study homelessness in the state and develop strategies to address rising homelessness. The bill requires TACIR to complete this study using existing resources and submit a final report - including any policy recommendations - to specific legislative committees and the legislative librarian by January 31, 2027. This is a procedural bill focused solely on directing a study; it does not create new laws or directly affect residents. The study aims to inform future legislative action on homelessness, but the bill itself has no immediate policy impact.