The HHSC Civil Rights Office must receive the complaint of discrimination within 180 days of the date the alleged discriminatory action took place. The ADA provides an important tool to fight discrimination: filing a complaint with an appropriate federal agency.This page outlines the steps to do so. There are strict deadlines for filing a charge of discrimination, please review the information in the timeliness tab or call 1-800-669-4000. Unlawful Employment Activities. Discrimination. This article explains how to file a complaint if you believe your employer has discriminated against you. What is disability discrimination? If you believe that you or someone else experienced unlawful discrimination, you can report a disability rights violation. 1. Report using our online form. Disability Discrimination Is Common.