Please, only email if you're seeing an error message that says you have a promotional copy and your CD Key doesn't start with 712P. If you're having other registration problems, I can't help with that. You need to contact the Sales department for those.
Bill, email the address above with your tax question. I'm not sure what you're talking about.
Synthetic -- don't want to take you from your box stuffing duties, but I concur with Bill that there is some kind of bug with the Tax calculation on the upgrade page. I would have slapped down my $50 yesterday, but it requested $49.45 in taxes on a $50 purchase. This tax amount wouldn't even correlate to the full purchase amount of $599 in my state -- if that is Tascam's policy (which wouldn't make too much sense, seeing as I have already complied with all tax requirements when I paid retail for GS 2.5.)
Just chiming in to help clarify this specific issue.
OK, I've let the web guys know about the tax problem. They're working on it.
They've also fixed a bug in the CD Key checking algorithm that was causing some keys to show up as "promotional versions not eligible for upgrades." You might want to try again. At least two of you who emailed were not registered in our database. You need to have registered your copy of GigaStudio 2.5 to qualify for the upgrade pricing.