I will be doing forex trading full time and I am concerned about taxes. I will be scalping the market and my trades will not be opened for more than a few minutes at a time. Can anyone tell me what my tax implications are? Tax bracket, etc. Thank you in advance.

Answer
And you really do need to seek some good face to face assistance and advice about this type of trading with what you are calling forex trading and try and make sure that you do have and get ever thing set up correctly for your scalping the market trades by the minutes and all of your bookkeeping written records that will be required for this business operation at this time in your life.
Foreign exchange market - Wikipedia, the free encyclopedia

http://en.wikipedia.org/wiki/Foreign_exchange_market

The foreign exchange market is the most liquid financial market in the world. Traders include large banks, central banks, institutional investors, currency speculators, corporations, governments, other financial institutions, and retail investors.
And for this purpose YA would not be the perfect place for you to try and get it started correctly as you would need to have it done.
Hope that you find the above envclosed information usefu. 05/14/2012

What is the difference among Currency Futures, Currency Derivatives and Forex Trading?

Answer
Here is the full wikipedia definition and explanation of all 3 of those terms:

http://en.wikipedia.org/wiki/Currency_future
http://en.wikipedia.org/wiki/Derivative_%28finance%29
http://en.wikipedia.org/wiki/Foreign_exchange_market