Endwalker code invalid! Please Help!

[worldofneil]

I purchased the $60 Digital Collector's Edition from here: https://ffxivstorehub.square-enix-games.com/en_US

SE store hasn't released the actual Endwalker codes yet, so what you have is the early access code.

The only PC players with the Endwalker code are Steam users (who can't redeem it yet anyway).

Non-Steam users will get the code after early access starts/the official launch date.

I then go into my mogstation, click on "enter item code" and paste the code in the text boxes

It's not an item code. It's the early access code. Put it in the correct place for that and it will work.

On the page where it shows you the code it has a link for "Instructions" where it literally tells you how to use it: (copied and pasted from there)

CODE INSTRUCTIONS
1. Log in to the Mog Station with your Square Enix account.
2. Select 'Your Account' from the top menu.
3. Select the service account you want to register the code on.
4. After confirming your Service Account, select "Enter Pre-order Bonus Code (Early Access Code)."
5. Enter your code and follow the instructions on-screen.
6. Log into the game and retrieve in-game items via the Moogle Delivery Service.

NO MATTER HOW MANY TIMES I try to paste the code, it ALWAYS says "This code is invalid" I KNOW that I AM entering it in CORRECTLY as I copied and pasted the code STRAIGHT FROM Square Enix!

Like pretty much all of your posts, your problems are caused by you not reading and/or understanding correctly. Slow down perhaps?