Core Viewpoint - The article discusses the tax treatment of mixed sales and the distinction between single sales behaviors and mixed operations, emphasizing the need for separate accounting for different tax rates in mixed operations [5][6]. Group 1: Definition and Characteristics - Mixed operations involve taxpayers engaging in both the sale of goods and the provision of services, which are subject to different tax rates [5]. - Key characteristics of mixed sales include the necessity for separate accounting of sales amounts for different tax rates, while single sales behaviors do not require such separation [7]. Group 2: Tax Treatment - Taxpayers must account for different tax rate projects separately; failure to do so results in applying the higher tax rate [6]. - In mixed sales, if a taxpayer sells goods and provides related services as a single transaction, the tax is applied based on the primary business activity [9]. Group 3: Case Studies - Case 1: A store sells an air conditioning unit with free installation as a package, treated as a mixed sale, taxed at 13% [10]. - Case 2: A store sells air conditioners separately from installation services, treated as mixed operations, requiring separate accounting for tax purposes, with air conditioners taxed at 13% and installation services at 9% [10]. Group 4: Special Provisions - Certain sales involving construction services must be treated as mixed sales, requiring separate accounting for goods and construction services, each subject to different tax rates [11][12].

Core Viewpoint - The article clarifies the differences between "mixed sales" and "concurrent operations" in the context of VAT declaration, emphasizing the need for separate accounting based on applicable tax rates or collection rates. Group 1: Concurrent Operations - Concurrent operations refer to activities that involve the sale of goods, processing, repair services, and the sale of services, intangible assets, and real estate, which are subject to different tax rates or collection rates [1]. - Taxpayers engaged in concurrent operations must separately account for sales amounts subject to different tax rates or collection rates; if not, the higher tax rate will apply [2]. - Taxpayers involved in exempt or reduced tax projects must also separately account for the sales amounts of these projects; failure to do so will disallow exemptions or reductions [3]. Group 2: Mixed Sales - Mixed sales involve a sales activity that includes both services and goods [4]. - Units and individual businesses engaged in the production, wholesale, or retail of goods must pay VAT based on the sale of goods; other units and individual businesses must pay VAT based on the sale of services [5]. Group 3: Special Circumstances - In the case where a general taxpayer sells self-produced machinery while providing installation services, they must separately account for the sales amounts of machinery and installation services, with the latter eligible for simplified tax methods [6]. - If a general taxpayer sells purchased machinery while providing installation services and has already accounted for them separately, the installation services can also be taxed using simplified methods [7]. - Taxpayers providing maintenance services for machinery after installation must pay VAT according to "other modern services" [8]. - When a taxpayer sells self-produced goods like activity board houses or machinery while providing construction and installation services, this does not fall under the mixed sales category, and they must separately account for the sales amounts of goods and construction services, applying different tax rates or collection rates [9].