Which of the following is true about Box 1?

Box 1 on a VAT return is designated to show the total output VAT that a business has charged on its sales during the relevant accounting period. This figure represents the VAT collected from customers on taxable supplies made by the business. It is essential because it provides a clear overview of VAT that the business is responsible for paying to HMRC (Her Majesty's Revenue and Customs) based on sales made.

The other choices do not accurately represent the function of Box 1. For instance, VAT on international services is typically reported in different boxes based on specific circumstances, and net VAT payable, which includes input VAT and other adjustments, is captured elsewhere on the form. Additionally, Box 1 does not exclude VAT on imports, as imported goods can affect the overall VAT position, but this is more closely related to input tax, which is reported in different sections of the VAT return. Thus, B is the most accurate description of Box 1.