important Website links of Tax matters

Indian Professional Institutions

ICAI - https://www.icai.org/
ICSI - https://www.icsi.edu/
ICWAI - https://myicwai.com/

International Accounting Bodies

IFAC -International Federation of Accountants - https://www.ifac.org/
IASB - International Accounting Standards Board - https://www.iasb.org.uk/
CAPA -Confederation of Asian and Pacific Accountants - https://www.capa.com.my/
SAFA -The South Asian Federation of Accountants - https://www.esafa.org/

Direct Tax Related

Central Board of Direct Taxes - https://finmin.nic.in/
Tax Information Network - https://www.tin-nsdl.com/
Income Tax India- https://www.incometaxindia.gov.in/
Income Tax E-Return Filing - https://www.incometaxindiaefiling.gov.in/
Income Tax - Delhi - https://www.incometaxdelhi.nic.in/
Income Tax - Karnataka - https://www.incometaxbangalore.org/
Income Tax - Mumbai - https://www.incometaxmumbai.nic.in/
Income Tax - Tamil Nadu - https://www.incometaxtn.gov.in/
UTI PAN Services - https://www.utiisl.co.in/

Indirect Tax Related

Service Tax - https://exciseandservicetax.nic.in/
Central Board of Excise & Customs - https://www.cbec.gov.in/
Delhi VAT - https://www.dvat.gov.in/
Maharashtra VAT - https://www.salestax.maharashtra.gov.in/
Rajasthan Sales Tax/VAT - https://www.rajtax.net/
Haryana Taxes - https://www.haryanatax.com/
Karnataka Taxes - https://www.kar.nic.in/finance
Tamil Nadu Sales Tax - https://www.tnsalestax.com/
West Bengal Taxes - https://www.wbfin.nic.in/