How do I split the gross VAT Amount in the split transaction window?

The default in Quicken is to add VAT to the amount that is entered by the user. If you wish to have Quicken split the total amount into the expense and tax amounts automatically, simply choose Edit > Split VAT (in the menu just under the category field in a split or business form). Make sure that the cursor is NOT in the Amount or VAT Amount field when you complete this operation, or the calculation will be incorrect because Quicken thinks you are overriding the VAT amount it has calculated.