ICAI: https://www.icai.org/

Income tax: https://incometaxindia.gov.in/Pages/default.aspx, https://www.incometaxindiaefiling.gov.in/home

TDS: https://www.tdscpc.gov.in/

Companies Act: http://www.mca.gov.in/

Ministry of Udyog: https://msme.gov.in/, https://udyogaadhaar.gov.in/

Reserve bank of India: https://www.rbi.org.in/

Director General of Foreign Trade: https://dgft.gov.in/

Maha GST:  https://www.mahagst.gov.in/en

GST filling website: https://www.gst.gov.in/

Eway Bill Generation: https://ewaybill.nic.in/