The Basis tab contains a lists of documents used as the basis for this tax invoice. This tab is available in the following cases:

• If the tax invoice was generated for multiple invoices selected in the Invoices list.
• If in manually created tax invoice you selected the Invoice transaction type and the Summary check box. In this case, you can select multiple invoices on this tab.

The "Tax Invoice (create)" form. The Basis tab

To add a document to the list, click Add and in the Basis column, select a document of the appropriate type. Repeat for all the documents to be added to the tax invoice.