Hello,
I am reviving this thread because I find myself in the exact situation described by romfeo. My business is based in Germany so I need to declare VAT under Reverse Charge for any digital good I purchase in the Unreal Marketplace. The tax can be recovered by also declaring the same amount as input VAT. However, in order to declare input VAT under Reverse Charge, I need to produce an invoice by Epic Games subject to many requirements including the address and VAT number of my company (as customer). How do I provide my company information to Epic Games so that their invoices comply with the Reverse Charge procedure?