1. PAN :

• Know your PAN : https://incometaxindia.gov.in/Pages/tax-services/online-pan-verification.aspx
• Know your AO : https://eportal.incometax.gov.in/iec/foservices/#/pre-login/knowYourAO
• Status of Pan on Nsdl : https://tin.tin.nsdl.com/pantan/StatusTrack.html
• Status of Pan on UTIITSL : https://www.trackpan.utiitsl.com/PANONLINE/#forward
• Apply pan thru NSDL Online : https://www.onlineservices.nsdl.com/paam/endUserRegisterContact.html
• Apply pan thru UTIITSL Online : https://www.pan.utiitsl.com/PAN/mainform.html
• Pan application center of NSDL : https://www.protean-tinpan.com/pan-center.html
• Pan application center of UTIITSL : https://www.psaonline.utiitsl.com/PanPSACenters/forms/applicationCenters

2. TAN

• Know your TAN : https://incometaxindia.gov.in/Pages/tax-services/know-your-tan.aspx
• Apply for TAN online : https://tin.tin.nsdl.com/tan/form49B.html
• Apply for change of TAN Data Online : https://tin.tin.nsdl.com/tan/ChangeRequest.html

3. E-payment Online

• Income Tax e-payment : https://eportal.incometax.gov.in/iec/foservices/#/e-pay-tax-prelogin/user-details
• GST payment : https://payment.gst.gov.in/payment/
• Custom e-payment : https://epayment.icegate.gov.in/
• PF e-payment : https://unifiedportal-emp.epfindia.gov.in/epfo/
• ESI e-payment : https://www.esic.in/ESICInsurance1/RevenueOne/Monthly%20Contribution/eChallan.aspx

4. Income Tax

• Register on Income Tax portal : https://incometaxindia.gov.in/Pages/tax-services/registration-e-filing.aspx
• Login to Income Tax portal : https://eportal.incometax.gov.in/iec/foservices/#/login
• E-Verify Return : https://eportal.incometax.gov.in/iec/foservices/#/pre-login/eVerifyReturn-bl
• Traces Login / View Tax credit statement (Form 26AS) : https://www.tdscpc.gov.in/app/login.xhtml
• Link Aadhar Status : https://eportal.incometax.gov.in/iec/foservices/#/pre-login/link-aadhaar-status

5. Provident Fund and Employee State Insurance (PF & ESI)

• PF Registration form for Employers : https://www.epfindia.gov.in/site_en/index.php
• EPF Forms : https://www.epfindia.gov.in/site_en/index.php
• Login to EPF Portal : https://www.epfindia.gov.in/site_en/index.php
• Employer Registration in EPF : https://www.epfindia.gov.in/site_en/index.php
• Employees state Insurance Corporation services : https://www.esic.gov.in/

6. Ministry of Corporate Affairs (MCA 21)

• MCA 21 Login : https://www.mca.gov.in/mcafoportal/login.do
• Company forms download : https://www.mca.gov.in/MinistryV2/companyformsdownload.html
• LLP Forms download : https://www.mca.gov.in/content/mca/global/en/foportal/fologin.html
• Check company name : https://www.mca.gov.in/mcafoportal/showCheckCompanyName.do
• Find LLPIN : https://www.mca.gov.in/mcafoportal/findLLPIN.do
• Check LLP Name : https://www.mca.gov.in/mcafoportal/showCheckLLPName.do
• Find CIN : https://www.mca.gov.in/mcafoportal/findCIN.do
• Enquire DIN status : https://www.mca.gov.in/mcafoportal/showEnquireDIN.do
• Check annual E-filing status : https://www.mca.gov.in/mcafoportal/showCheckFilingStatus.do

II] RATES

1. Rates of Income Tax : https://contents.tdscpc.gov.in/en/personal-income-tax.html
2. Rates of TDS : https://contents.tdscpc.gov.in/en/rates-and-table.html

III] Cost of Inflation Index

1. New Cost of Inflation Index : https://incometaxindia.gov.in/charts%20%20tables/cost-inflation-index.htm
2. Old Cost of Inflation index : refer attached pdf :