You may select to change the amounts to be displayed as exclusive or exclusive of Output Tax (VAT/GST/Sales tax) on all sales documents for debtors (customers / clients) (i.e. Invoices, Credit notes and Quotes) and exclusive or exclusive of Input Tax (VAT/GST/Sales tax) on all purchase documents for creditors (suppliers / vendors) (i.e. Purchase, Supplier returns and Orders). 

The selling price amounts for debtor (customer / client) documents are automatically inserted in the documents when a stock item is selected. 

Please take note of whether these selling prices are entered or adjusted Inclusive or Exclusive of Tax (VAT/GST/Sales tax) on Stock items (Action ribbon), or if you adjust the selling prices in the Input → Adjust stock (Action ribbon)

The purchase (cost) price amounts for creditor (supplier / vendor) documents are automatically inserted in the documents when a stock item is selected. 

By default, the amounts are inserted or entered (if manually over-typed) Exclusive of Tax (VAT/GST/Sales tax) on the amount column of the document lines. To enter and view amounts Inclusive of Tax (VAT/GST/Sales tax), you may select (tick) the "Default inclusive for documents" field on Stock information (Setup ribbon)

documents-default-inclusive-tax-setting

Tax Exclusive mode

To set the Exclusive of Tax (VAT/GST/Sales tax) mode: 

1.Click on the F7:Exclusive icon. 
documents-exclusive-tax

2.The amount will change to the selected mode, and will be displayed in the transaction section, as well as at the bottom of the "Document entry" screen. 

You may press the F7 key or click on the F7:Exclusive / F7:Inclusive icons on the "Document entry" screen for unposted documents to toggle between the Inclusive or Exclusive modes.

Tax Inclusive mode

To set the Inclusive of Tax (VAT/GST/Sales tax) mode: 

1.Click on the F7:Inclusive icon. 

documents-inclusive-tax

2.The amount will change to the selected mode, and will be displayed in the transaction section, as well as at the bottom of the "Document entry" screen.