INC-20A is a mandatory form that is to be filed by a company incorporated on or after 02/11/2018 with MCA. It is also known as Declaration of Commencement of Business. It should be filed by the directors within 180 days from date of incorporation of a company which has share capital. Once the company receives a certificate of incorporation, the directors will file declaration certificate of commencement of business. It is mandatory to open a current account in a bank for depositing the share capital subscribed in MOA by each and every promoter.