This report provides practical guidance to tax authorities on the design and implementation of a variety of solutions for digital platforms, including e-commerce marketplaces, in the effective and efficient collection of VAT/GST on the digital trade of goods, services and intangibles. In particular, it includes new measures to make digital platforms liable for the VAT/GST on sales made by online traders through these platforms, along with other measures including data sharing and enhanced co-operation between tax authorities and digital platforms. It builds on the solutions for the effective collection of VAT/GST on digital sales included in the International VAT/GST Guidelines and the 2015 BEPS Action 1 Final Report "e;Addressing the Tax Challenges of the Digital Economy."e; It is of particular relevance recognising the growing importance of the platform economy and notably the potential of digital platforms to significantly enhance the effectiveness of VAT/GST collection given their important role in generating, facilitating and/or executing online sales.