Useful links

Income Tax Department
Official website http://www.incometaxindia.gov.in/
Remittance of income tax https://onlineservices.tin.nsdl.com/etaxnew/tdsnontds.jsp
Filing of income tax return and status of tax credits https://incometaxindiaefiling.gov.in/portal/index.jsp
Ministry of Corporate Affairs
Official website http://www.mca.gov.in/MCA21/
Central Board of Excise & Customs
Official website http://www.cbec.gov.in/cae1-english.htm
Filing of excise and service tax returns http://www.aces.gov.in/STASE/ui/jsp/common/switch.do?prefix=/ui/jsp/common&page=/loginpage.do
Remittance of excise and service tax https://cbec.nsdl.com/EST/InputPageForEPaymentServlet
Reserve Bank of India
Official website http://www.rbi.org.in/home.aspx
Securities & Exchange Board of India
Official website http://www.sebi.gov.in/sebiweb/
Commercial Taxes Department
Kerala Commercial Taxes Department http://keralataxes.gov.in/
Karnataka Commercial Taxes Department http://164.100.80.121/ctax/
Tamil Nadu Commercial Taxes Department http://www.tnvat.gov.in/
Software Technology Parks of India
STPI Chennai http://www.chennai.stpi.in/stpc.html
STPI Trivandrum http://www.tvpm.stpi.in/
STPI Bangalore http://www.soft.net/
Special Economic Zones & IT Parks
Cochin Special Economic Zones http://www.csez.com/
Infopark, Cochin http://www.infopark.in/
Technopark, Trivandrum http://www.technopark.org/