What is NPS?

The central government launched the NPS (National Pension System) in 2004. It is presided over by the Pension Fund Regulatory and Development Authority of India (PFRDA). At first, it was only available to employees of the central government, giving them a platform to invest and build up savings for their retirement. Later, in 2009, the PFRDA became available to all Indian citizens by broadening its scope. Additionally, Sections 80C and 80CCD allow tax deductions for investments made in the NPS.

https://www.fundsindia.com/national-pension-system

How early can I start investing?

This is one famous question in the field of investments. You can start investing as young as you can. Starting investment at an early age can be very beneficial. For instance, when you start a SIP in your early 20s, you can have a solid corpus at the time of your retirement. A year's delay in your investment journey can produce a big difference in your corpus at the time of maturity. Hence, you are never too early to start your investment.
The power of compounding can provide you with big returns if you invest periodically and regularly. To explain in detail, if a person starts investing