This is how I enter my details into my Invoices.  As you can see the Parts line has tax applied with the check box.  Just starting in Feb the Sales Tax Liability report is not summing the Taxable Amount column correctly.  It is adding the labor amount into the figure.  It should only be the Parts line that I select tax on.  Also if an invoice has no tax selected (because some of my customer's are tax exempt), it still adds those lines amounts to the Taxable Amount column when it should not and in the past did not.