Let's say I have product review business. Companies send me free products that I tinker with, then write about. Questions:

Do I have to pay taxes on the products I receive (are they considered gifts?)?

If yes to the above, should I just send them back when I'm done instead?

If yes to the above, are the shipping costs to send the products back tax deductible?

What about if I give the products away to charity instead?


Thank you!