For sure stamps the TM47 when its a one year one.. But yeah ok so 'prints' not stamps.
I had thought when you did it online or postal it went from the end date rather than the date it is performed ? is that not a correct memory? Its been a while since I managed one of those due to travels and the first report in person.
Some offices stamp you 90 days from report, not 90 days from entry.. So if you go 14 days early.. you can still be over 7 days past the 2nd 90 if your in really bad luck.
Tattooing is not going to be something you can do remote, so would be in violation of labor laws to try to do here.. I cannot thin it will do anything other than complicate the application.