If you don't have an account you will be able to create one once you have completed the check out and finalized your purchase.
But never fear you can always create an account at a later date. Any previous orders will show up in your account as long as you use the same email address to create your account as previous purchases.
There are many perks to having an account.
1) Your shipping and billing details will be saved so you don't have to type them in on your next purchase.
2) You can see a history of your orders which makes it easy to retrieve order numbers for tracking shipments etc.
3) You'll get a warm fuzzy feeling inside.