Hey there... I live in WA state and I've done photography for myself as a hobby for a while. Recently I've done some work for friends and other individuals are now interested in my work. I am planning on doing some photography for anyone who is interested and charging them. I was wondering if I need a license to do this? Or if there are any other things I should worry about. Its not something I plan on doing full time... just on the side. Thanks.

You may need a business license - it depends on your exact location (city, county) in WA state. You will have to ask at your city or county clerk's office.

I don't know the details of WA's sales tax law, but you may need to pay sales tax on services and photos and need to get a resale license to collect the tax from customers, then file and pay it to the state. For WA see: Retail sales tax

You will need to file a schedule C to account for your photography income. On the flip side, you can deduct your costs including mileage (currently this is $0.55 per mile) to/from photo stores to buy supplies, to/from meetings with clients and shoots, and of course your photo supplies and equipment. If you work it right, as a part-time photographer often your income will be pretty much offset by expenses so you don't have to pay income tax on the money you earn from your photography.

I would speak to an accountant you trust. They can assist you in whether it would be worth incorporating. There are pros and cons. A corporation will give you better write-offs, and limits your personal liability (which in this profession and age of the internet are very serious considerations).