I make a good money with google adsense and I'm registered in the US, this summer I visit my home country for about 5 months, I advertise a lot my websites in my country, is it possible to deduct these expenses from IRS? What proof should I include? if you don't know please suggest somebody to contact or a tax forum Thanks
Some % of the trip may be deductible as a business expense if you actually have records of where you went, what you did and what business was discussed at those meetings. To get the final answer you most likely will need to consult with a cpa.
If you're making really good money with Google the cost of consulting with a CPA will be more than offset by the tax savings they'll find for you. Just look in your local yellow pages, there are CPAs everywhere.