Transferring domain names

I have recently had my one year anniversary at smugmug and so my custom domain registration was up too. I have been using yahoo and it worked fine but when I went to pay for another year there was some problems with my credit card billing address and I also noticed discrepancies with the price. They have no way to reach them and have suspended my account. I was so fed up I went to smugmugdomains and paid for a transfer. Even though I have read The Insider's Guide to Domain Transfers. I can't figure out how to proceed. The guide has a section on obtaining an authorization code. I think that is what I'm suppose to do next? They list Registrars and I don't see Yahoo listed. Does Yahoo have a different name associated with this?

The transfer price did show up on my bank statement on July 23rd but I don't understand what I need to do next. In the mean time my custom web address doesn't work. Hopefully it won't involve calling the same customer service number as I was suppose to use for fixing my yahoo domain name billing because they just have a recording saying they are recieving a large volume of calls and then it disconnects.

I'm shooting my first professional wedding August 8th and I really would like my site working as it should by then.

Any help would be appreciated greatly!

Linda