How do I trademark my logo and how much will it cost?
Go to www.uspto.gov
Under the tab Trademarks, see application process and click apply online
There are 3 application forms that all will work to begin your trademarking process.
TEAS (Trademark Electronic Application System)
TEAS plus form ($225) Fill out complete initial application and agree to conduct correspondents electronically.
TEAS reduced fee ($275) You do not have to fill out an initial application but do have to agree to conduct correspondents electronically.
TEAS regular ($400) If you can not fill out the initial application and you do not want to conduct correspondents electronically you can use the regular form.
I recommend going with the TEAS plus form.
Note: this is for the United States Paten and Trademark Office.