Well my friend wasn’t sure if adsense was a legal ads before so he sign up with he’s nick name but real address and he hasn’t give them hes tax ID yet then google close the account defore he get the pin # that they sent out to you. So can he still potentially sign up again using he’s real name?

I am employed but hope to start something on the side. I would like to sell ad space or use adsense. the website does not generate any income, but if it does with time, should I incorporate the website anyway (at this time or in the future)? (LLC). how much does it cost? my only concern is tax advantage. If i don't incorporate will all my earnings (from a job and ad income) be taxed at a higher rate? what's a good strategy? thanks!

I heard your SSN/Tax ID is needed to register for Adsense.
What if I make up a fake one?

And Adsense can technically be used by any one regardless of age? I know a few preteen website designers/owners myself that use them.

They need the SSN so the IRS can check if you’re tax frauding or not but what if you don’t have a job yet?