Income Tax payment – https://eportal.incometax.gov.in/iec/foservices/#/e-pay-tax-prelogin/user-details

Income Tax Calculator – https://incometaxindia.gov.in/pages/tools/income-tax-calculator.aspx

Company Name Search – https://www.mca.gov.in/mcafoportal/showCheckCompanyName.do

Company Fee Calculator (ROC) – https://www.mca.gov.in/mcafoportal/enquireFeePreLogin.do

Trademark Search – https://ipindiaonline.gov.in/tmrpublicsearch/frmmain.aspx

GSTIN Search – https://services.gst.gov.in/services/searchtp

GST Rate / HSN Search – https://cbic-gst.gov.in/gst-goods-services-rates.html

E-way bill – https://ewaybillgst.gov.in/Login.aspx

Reserve Bank of India – https://www.rbi.org.in/

Director General of Foreign Trade – https://dgft.delhi.nic.in