Hi, I have tax question on affiliate earning and if anyone can give me feedback, I really appreciated. Let say I have spend $10,000 on ads (facebook, adwords, etc) to earn $20,000 affiliate products for Year 2015. Then, I only earned net $10,000 but I'll be getting 1099 from from affiliate company for $20,000. Is all $10,000 ads spend can be tax deductible that I only need to pay taxes on $10,000 of net earning? If anyone here with tax expert can give me feedback on this?