The Director General of Goods and Services Tax Intelligence (DGGI) has launched an investigation into ride-hailing firms Uber and Ola. The DGGI has issued summons to officials of the two companies related to alleged tax evasion worth hundreds of crores of rupees, according to the sources. The tax liability dues for Uber India has reportedly been calculated as about Rs 800 crore, while as for Bengaluru-based Ola, it has been set at around Rs 300 crore. However, according to the industry sources, two different tax intelligence teams based in different cities have calculated the dues for the companies and sent the notices based on their interpretation. “This has resulted in the calculation of the tax at the rate of 15 per cent for Uber and 6 per cent tax for Ola,” said an industry source.