A File Validation Utility, also known as FVU, permits you to confirm your e-TDS or TCS return file. NSDL provides this utility as part of its services. A deductor's return file must track specified structures in order to be verified by the FVU. Using this utility, you can submit an error-free TCS & TDS return. This blog post discusses the various steps for downloading and generating FVU files using Gen TDS return filing software.