Welcome to the Georgia Tax Center (GTC) Information Site Welcome to the information site for the Georgia Tax Center (GTC). We are pleased to offer this new customer-facing application. If you have Sales & Use Tax or Withholding Income Tax responsibilities or file these taxes on behalf of others, this site contains valuable information for you. GTC is a secure electronic customer self-service system, which provides taxpayer access to registration, filing, payment and review of up-to-date taxpayer account information. Please refer to the resources within this website to sign up for and use GTC. To continue to GTC, Click Here