How do I get the Infinite Warfare beta if I preordered the game

If you preordered from the Xbox Store, you'll already be registered for the beta and won't need a code.

If you preordered from a retailer and got any codes for any preorder incentives, that code will get you into the beta. You can find more info here -

support.activision.com/.../Call-of-Duty-Infinite-Warfare-Beta-FAQ

If you pre-ordered digitally you are automatically enrolled in the beta. Simply find it on the Store and download. If you pre-ordered at a different retailer you would have received a code to download.

I am having the same problem i pre ordered infinite warfare and iv shut down and on my xbox as more than 24 hours has passed and i go to the store type infinite warfare i select infinite warfare cp incentive and it says it is currently not available and
do i get to be in the beta if so where is my code going to be

I am having the same problem pre ordered infinite warfare and iv shut down and on my xbox as more than 24 hours passed amd i go to store type infinite warfare i select cp incentive and it says it is currently not available and do i get to be in the beta
if so where is my code going to be

Is it a game disc or digital game pre-ordered online?

If game disc, there should be a beta game code but for a limited time and also from the participating retailers only

If digital pre-purchase/pre-order, you should be eligible already. Kindly check this link.

COD Infinite Warfare Beta Faq