You have to be at least 18 years old to get tattooed. This is the LAW. This law on tattooing has been in place since 1969. It is not a parental consent thing, you cannot get tattooed legally under the age of 18. Any tattoo artist willing to risk their licence and break the law to tattoo you is not your friend doing you a favour, they are likely so bad that the only work the can get is exploiting underagers for money.