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To add VAT amounts, you'll first need to set up Tax by selecting the 'Taxes' tab from the left-hand menu and entering your companies filing details.
Once you've enabled this, you'll then see a column for 'VAT' when entering transactions, which you can click to select the applicable tax code from the drop-down.
You can turn on/off any codes by going to Taxes > Edit VAT > Edit rates > Select the small cogwheel > include inactive. Please click here to see our full range of QuickBooks VAT codes and how these will post on your VAT return.