Once you are logged in, you'll be asked to Rocket League Trading set a Primary Platform. Your Primary Platform might be your supply of development (Rocket Pass Progress, Competitive Rank, XP Level) for all your connected systems. In different words, make sure to pick out the platform in which you have the most development in Rocket Pass, and your highest Competitive Rank.
Credit and Esports Token balances will live tied to every platform as they can't be transferred to a brand new platform. Once your Primary Platform is chosen, you may be capable of play along with your Competitive Rank, and Rocket Pass development, and XP Level on all other related systems.
From here, you'll be able to link any platforms you play across in your account and designate any one of Rocket League Item Prices them as your Primary Platform. As an delivered incentive for going thru the trouble, every body who hyperlinks up an Epic Games Account will receive the Chopper EG Wheels you can see in the photo above.