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In those circumstances, the Fővárosi Közigazgatási és Munkaügyi Bíróság (Administrative and Labour Court, Budapest, Hungary) decided to stay the proceedings and to refer the following questions to the Court of Justice for a preliminary ruling: ‘(1) Must the objectives of [Directive 2006/112], in particular the requirements for the prevention of jurisdictional conflicts between Member States and double taxation, referred to in recitals 17 and 62 thereof, and [Regulation No 904/2010], in particular recitals 5, 7 and 8 and Articles 7, 13 and 28 to 30 thereof, be interpreted as precluding a practice of the tax authorities of a Member State which, by attributing to a transaction a qualification that differs both from the legal interpretation of the same transaction and the same facts that was carried out by the tax authorities of another Member State and from the response to the binding inquiry provided by those authorities on the basis of that interpretation, as well as from the confirmatory conclusion of both that those authorities reached in the tax inspection they carried out, gives rise to the double taxation of the taxable person? (2) If the answer to the first question is that such a practice is not contrary to EU law, can the tax authorities of a Member State, taking into account [Directive 2006/112], unilaterally determine the tax obligation, without taking into consideration that the tax authorities of another Member State have already confirmed, on various occasions, first at the request of the taxable person and later in its decisions as a result of an inspection, the lawfulness of that taxable person’s actions? Or should the tax authorities of both Member States cooperate to reach an agreement, in the interests of the principle of fiscal neutrality and the prevention of double taxation, so that the taxable person has to pay [VAT] in only one of those countries? (3) If the response to the second question is that the tax authorities of a Member State can change the qualification of a tax unilaterally, should the provisions of [Directive 2006/112] be interpreted as meaning that the tax authorities of a second Member State are obliged to return to the taxable person required to pay VAT the tax determined by those authorities in response to a binding inquiry and paid in relation to a period closed with an inspection, so that both the prevention of double taxation and the principle of fiscal neutrality are guaranteed? (4) How should the expression in the first sentence of Article 33(1) of [Directive 2006/112], according to which the transport is carried out “by or on behalf of the supplier”, be interpreted? Does this expression include the case in which the taxable person offers as a seller, in an online shopping platform, the possibility for the buyer to enter into a contract with a logistics company, with which the seller collaborates for operations other than the sale, when the buyer can also freely choose a carrier other than the one proposed, and the transport contract is concluded by the buyer and the carrier, without the intervention of the seller? Is it relevant, for interpretative purposes — especially taking into account the principle of legal certainty — that by the year 2021 the Member States must amend legislation transposing the aforementioned provision of [Directive 2006/112], so that Article 33(1) of that directive must also be applied in case of indirect collaboration in the choice of carrier? (5) Should EU law, specifically [Directive 2006/112], be interpreted as meaning that the facts mentioned below, taken as a whole or separately, are relevant to examine whether, among the independent companies that carry out a delivery, expedition or transport of goods the taxable person has arranged, to circumvent Article 33 of [Directive 2006/112] and thereby infringe the law, legal relationships that seek to take advantage of the fact that the VAT is lower in the other Member State: (5.1) the logistics company carrying out the transport is linked to the taxable person and provides other services, independent of transport, (5.2) at the same time, the customer may at any time depart from the option proposed by the taxable person, which is to order the transport to the logistics company with which it maintains a contractual link, being able to entrust the transport to another carrier or personally collect the goods?’