The engines of Tiago XZ Plus is different from the Tiago JTP. The engine of Tiago JTP is compatible with the turbocharger. Therefore, the modification is not possible. However, you can visit the nearest service centre as they will be the better people to assist you. You can click on the following link to see the details of the nearest service centre and selecting your city accordingly - Service centre.
You may go for the Hyundai Grand i10 Nios if you are looking for a car with the refined BS-Vi compliant engine, more features and good drivability with better cabin space. However, the Tata Tiago JTP is a performance car with a bigger and more powerful engine which makes this car a more furious vehicle.