Hello I registered a domain name "bestyahoobuzz.info few months before I received an email from Yahoo to deactivate the domain I deactivated the domain but how I contact yahoo to transfer the domain ??
I would not worry about it... If you are so worried, contact your register and have them delete it from your account, and the domain will go back on the market...yahoo really does not want the domain, they just do not want people using domains that have their name within the domain, if compaines had to maintain such domains like this, they would end up paying millions per year in renewal fees.
As long as you deactivated it then you should be all set. They really can't say anything as long as you are not using it and it is deactivated.
Unfortunately that's a terrible idea. If you mean Go Daddy's service being a parking page with ads, that can give the impression you're trying to commercially ride on Yahoo's mark and all. See in their email how to contact them to transfer. Or if you don't really feel like it, then tell your registrar to delete it as dscurlock suggested.