The default tax setting for Channels Magento Integration is Match on Tax Code Name. In same cases, your tax collection requirements may be more complicated. In these cases, you can use Taxes as a Line Item mode.
In Taxes as a Line Item mode, Channels pulls tax information from the Magento Order and uses the Magento Taxes Line Item on each sale for the tax value. This allows for more complex tax calculations to be performed in Magento and also ensures that Invoice Totals are correct when downloading Orders into your point of sale.
Connector Tax Settings
In order for this mode to function properly, you must create 2 Tax Codes in your point of sale, both with a 0% rate: "No Tax" and "Magento Taxes". More info about this can be found in the point of sale area: Lightspeed Retail or Lightspeed Onsite.
If you are using a third party tax calculation plugin in Magento, the tax value should also be passed off to Channels.