According to the policy of paytm, you must be 18 years old to do Paytm KYC .
If you are below 18 age, you cannot do complete paytm KYC process.
Paytm Terms & Conditions:
According to paytm terms & conditions user should be 18 age.
You must be 18 to KYC in any online company.Igf you are below 18 age then you can not complete paytm KYC .
To complete Paytm KYC, your age should be 18 or above 18. If you are below 18 then you can not complete Paytm KYC.