in your adsense account, simply enter the url to your blogspot blog, i.e.: myblog.blogspot.com But I have a feeling that you are asking where to put the channel code, right?
right, I have no idea what to do with that code... I don't see any field or something in blogspot settings.
You was right. I tried to use standard adsense modules. That was my mistake. Thanks. Rep added. ps: thanks for help to everyone.
you can create channels from your adsense control panel. you can get more information about channels on official adsense help site