Like others have said, talk to the folks at Costco about the profile and how to install it. Or just google > How to install Costco's Color Profile into Adobe Photoshop Elements. Also, ask Costco what Color space they require you to use for their printing. It's Probably sRGB. If that's the case, then the image file needs to be in that color space. So, after finishing your edit and you think you are ready to print, you would need to do what's called. Proof colors. The computer will show you pretty close what your image will look like if printed using, in this case, Costco's Printer Profile. It's not exact, but it's close. Things to remember, the computer monitor you are using to edit and view your image on should be color calibrated to ensure accurate colors. I don't do much printing anymore but back when my wife and I were competing in our Photo club's monthly print competition we used Costco for 11x14 prints. Funny story. In the club, every month we would have a guest speaker/professional speaking on specific topics. One month, a local Professional Photographer that owned her own local gallery business was the judge for our print competition. The speaker was going on and on about why you should send your best images to a professional lab for editing and development. My wife received a 1st place finish on one of her prints. The speaker/also the judge in the contest, was critiquing my wife's image. She was going on and on about the excellent color etc. She asked whose print it was and what pro lab was used for printing. My wife was very excited, she raised her hand and said proudly, " Costco's for less than 3 dollars! It was an awkward moment for the speaker. LOL. Good luck with your prints. And as always, ask if you have questions. This forum is filled with amazing talent and knowledge.

You & Wife were Lucky, Some of these Professional Photographers are Stupid Ass Jerks, Putting Down People About the Camera they Shoot it From, or, where you Got it Printed, Or How Many Megapixels you Shot the Photo From, Etc.

I have Seen Amateur Photographers Degraded & Put Down By Pro Photographers Regarding the Camera they Used, the Type of Film, when Film Cameras were "King" Back in the Day, if it was a Pocket Digital, The Pros Attitude was... Negative, & Would Put Down An Amateur Photographer, Cause of the Pocket Camera He or She Used to Shoot a High Quality Photo, & the Pro's Didn't Care if it was a $300.00 Hi-End Nikon, Canon, Or Sony, the Amateur Photographer Would Get Spit On by a Jerk Ass Professional, because He Or She Thinks Their "Big Time" Cause they Walk Around with a $3000 to $5000 Dollar High End Nikon or Canon, or Sony's Around their Necks, Along with Expensive Lenses Attached to them.

& Yes they are Better Hi-End Cameras, & Can Really do the Job, in All Weather, & Low Light, but An Amateur Cant Afford What the Pros have, & Prefer A Smaller Lighter Camera that has the Best Features, & Now Camera Phones Are Now Kicking Ass!

I'm Glad you & your Wife were Not Put Down By this Pro, & Accepted your Work, but I Feel Sorry for Others who are Put Down By the Jerk Pro Photographer who Thinks their "Big Shots" with Hi-End Cameras, & Lenses, & Other Hi Quality Equipment, & Rubs it in An Amateurs Face.

74images

If you go to https://www.drycreekphoto.com/icc/ and click on your state, there will be a list of all Costco's in that state and a link for the profiles of the printers in that store. You can download these profiles and use them to prep your files for online submission to Costco.

You might first try submitting a few test prints without using the profiles to see if they meet your quality needs. There is a box you can check or not check (at the end of the order process) to indicate whether or not you want corrections to occur. Costco does an outstanding job and meets my needs for most projects. For something really special I use Tempe Camera. Hope this helps.