E-tutorials of tdscpc.gov.in -link given-if u find ? to retr

These are all the e-tutorials / manuals of the new site . I do not find anywhere how to retrieve TAN Regn.No. Hope you all must have experienced it is for this reason we re-register. If this facility is also not made available what are the alternatives.

note that No where it is mentioned that it is offering re-registration facility. 

• e-Tutorials for Deductor
  • Registration and Login
  • Forgot User Id
  • Forgot Password
  • Download NSDL Conso File
  • Download Form 16
  • Download Form 16A
  • TRACES PDF Generation Utility
• e-Tutorials for Tax Payer
  • Registration and Login
  • Forgot Password

https://www.tdscpc.gov.in/en/user-manual.html