Is gst applicable

I have small service IT business and my turnover is less than 20 lakhs. However, I have my clients across different states. Does my business needs GST registration?

I found this article which said that inter state businesses need to have GST registration but it doesn't mention services, it has only mentioned traders

https://economictimes.indiatimes.com/news/economy/policy/gst-rs-20-lakh-registration-exemption-not-for-inter-state-traders/articleshow/59476364.cms