Worry is a side-effect of an Income Tax notice being issued in your name but just a notice doesn't conclude anything. One may get the notice due to multiple reasons which could include not filing the return on a timely basis, calculation errors, improper reporting of income (not concealment) or even claiming excessive losses.
If you have received any Income Tax notice, please make sure it carries a document number as now every notice/document/communication issued by the Income Tax Department shall carry a document number. To avoid any miscommunications, it is better to check for its integrity.
PPF 80-C Deduction or Investment
GST LIVE Certification Course - 42nd Weekend Batch(With Govt Certificate)