This document provides a corporate compliance calendar for key tax, audit, and regulatory deadlines in India from April 2017 to March 2018. It includes due dates for depositing withholding taxes, filing returns, issuing certificates, paying advance taxes, statutory audits, and Goods and Services Tax compliance. Key recurring deadlines include the 7th of each month for depositing withholding tax, quarterly advance tax payments on the 15th, annual returns by 30th June, and Goods and Services Tax returns due monthly on the 10th-20th.