Tax Guidance/Help

Hello.
I started my website about 6 months ago and it's starting to see some decent traffic. I've managed to acquire a few high PR links from some friends who have sites with good PR. I've been waiting since last update for my PR to go up to 7 or maybe even 8 in order to start selling advertising text-ads on some of my pages. Not because I want to sell PR(I know that's a 'no no'), but because with the higher PR rating the offer of advertising on my site would be more enticing to a potential customer. I will only seek themed links for pages I wish to offer text-ads on. Here's where the topic comes into play. I've never filed taxes before, I'm still young [19], but when I do offer these services of advertisement I want to know how I can go about when it comes to taxes. I don't want to have a lot of money and go spend it, then when tax time comes have the IRS knocking on the door saying I owe them $10,000 in taxes and not having a cent. I was wondering if anyone out there has advice, tips, knowledge on anything I can do in order to stay legit and not find myself in a bind. Someone told me to form an incorporated business and keep all receipts of transactions that I make, for tax reasons. I understand that, but I do need more details. Is there a certain percent that the gov. takes from you(I heard somewheres that it's 30%, but don't know if it's true)? Are there any good books that helps people like me with no tax kowledge what so ever to get them on the right track? I'm looking for any advice or anything you can port to this, because this is a BIG topic for me and I really want to understand it as well as I can.
Thank You.

Congratulations on your great success.

Free advice on these matters is frequently not reliable. Would you trust a forum of accountants to give you advice on running your site?

Make an appointment with a tax accountant. They are not extremely expensive and your new business is worth it. You might only need 30 minutes of their time to get started.

Incorporating your business and getting proper contracts prepared can protect you from lots of problems and does not cost that much money. An attorney can help here.

Getting these things done right when you are starting out can save you lots of time and lots of headaches.