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I hold Indian Passport with Valid USA Visa... Can you please share me the link to apply CAN+
 
There is no link and no specific application. Visa application centres are supposed to review all applications to screen for CAN+ eligibility. If you have a valid US visa, you will automatically be considered for it.
 
I hold Indian Passport with Valid USA Visa... Can you please share me the link to apply CAN+
The TRV application form is the same. If you apply online, you must scan your US visa (and any entry stamps) + specifically request for CAN+ processing.

If you submit a paper application then request VFS staff to mark your application for CAN+. You will need to also submit the passport that has the US visa