Because the obligations recur and the person who knows them goes on leave. Monthly filings and remittances, quarterly returns, annual filings and registrations — each with its own authority and deadline.
A missed deadline is rarely a knowledge failure. It is a scheduling failure, and it is solved by scheduling rather than by training.
Professional tax, Shops and Establishments obligations, and labour welfare fund requirements are state-level, so a multi-state employer runs several calendars at once.
The common failure is running the head-office state's calendar for the whole company, which is invisible until a notice arrives from somewhere else.
We deliberately do not. They change and vary by state; take them from the relevant authority or your consultant.
One named person with a named cover. Shared ownership is how deadlines get missed.
Annually at minimum. Obligations and frequencies change.
Half an hour with your own data usually saves reading three of these. The guides will still be here afterwards.