I've been softproofing and printing for many years, but I have a new situation (I'm using Photoshop CC 2018 and Lightroom Classic, on a Windows 10 machine).
My wife wants to have some prints made at Costco, and I downloaded and installed the appropriate Costco profile for their Fuji Frontier and Luster paper. No problem softproofing with the profile, and making the "after" image a "Proof Copy," optimized to look as close to the original as possible. For myself, I would then export the Proof Copy to Qimage and print with my printer not color managing.
I think I am supposed to upload to Costco images already converted to their profile. Is there any way to do this in Lightroom? Or should I export the Proof Copy to Photoshop and convert to the Costco profile there?
Also, Costco prints full-bleed, and apparently increases the size of the image by one or two percent. Should I simply crop the image to the 11x14 size she and Costco want, but increase the canvas size by a couple of percent?