The document provides instructions for completing a VAT return spreadsheet. It instructs the user to enter relevant dates in cells C5 and C7 of the "VAT Return" sheet. It also instructs the user to enter weekly sales figures in the "Sales" sheet and purchase invoices in the "Purchases" sheet, including date, cost excluding VAT, VAT amount, and total cost. Notes are provided about entering dates and the standard VAT rate of 17.5%.