I have dedicated hosting server at my local hosting provider. They told me that I have to write godaddy nameservers at godaddy and somewhere to add ip of my dedicated server. I can't find what are Godaddy namservers? And where should I write my dedicated server's ip?
Go to your domain manager on godaddy and click on your domain. Than click on Set nameservers. You need to have Park your domain option choosen so that you are using godaddy's nameservers. It might take few minutes to update than. After that, Total DNS Control option will show right of your dns servers. You can click that and set all your DNS settings there.