Just a reminder to the new writers among us, be sure to talk with your tax preparer about your writing business. Yes, business. Unless this is a hobby and your writing is never going to see the light of day, it needs to be treated as a business.
In addition to making sure you don't screw up your taxes and have 'Uncle Sam' at your door, you also need to check into state and local business requirements, business licenses, retail licenses; if you plan to sell books at a book signing event you may need a license from the city.
It's complicated and I don't dare say more than do your research.
The same is true regardless of where you live, even outside the US, ask an expert and get set up correctly, then get back to writing the next Great American Novel.