From psd to to tiff color problem

[Erica]

yes! i think i hate tiffs now. I want to go back to RGB!!

[Damien Symonds]

I don't want you to think that tiffs and CMYK are related.  They're separate issues.  Tiff files can be CMYK or RGB (or even Grayscale).  Just like Jpeg files can be CMYK or RGB or Grayscale.

Even if your printer had asked for CMYK Jpeg files, I would still be telling you that I'm worried about the CMYK profile.