Trademark Registration in Noida I MSME Registration in Noida I ISO Certification in Noida I IEC Code Registration in Noida I Class Three DSC Registration in Noida I GST Registration in Noida at very affordable prices Q. What would be the time limit for registration in GST once a person is liable to pay taxes in GST ? Ans . A person would have to register himself within 30 days from the day when he becomes liable to be registered, He can also register himself voluntarily under GST.