The Belgian Tax Authorities (i.e., FPS Finance) announced that the prepayment system is operational as from 2 September 2024 (see NL / FR). This means that prepayments for the Domestic Minimum Top-up Tax ((Q)DMTT) and/or the IIR Top-up Tax in Belgium can effectively be made provided that the group is registered for Pillar 2 minimum taxation in Belgium.
The first registration deadline for groups which intend to prepay was 15 July 2024. For other groups, the first deadline has been extended until 16 September 2024 (see Notification deadline for Pillar 2/GloBE registration extended in Belgium). A group in scope of the Belgian Law on minimum taxation will only be able to prepay once it is registered.