This is for the US. Lets say that you are a member of a affiliate network and you are making money. This network requires you to fill out an W-9 form. First, is this common that you have to fill out this form? what information is safe to give out to networks? If i dont want to give out my SSN i understand that i can apply for a Employer Identification Number (EIN), what are the steps to get one and use it? how and when would i be paying all my taxes? All these questions are broad but what i really need is for someone to clarify the process from when you join a network to making the money to paying taxes, staying legal and safe. thank you for the help.