You create sales and purchases tax groups to which you assign tax authorities.
Tax reporting currency allows clients to report taxes in a currency that is different than the customer/vendor currency or the functional currency. Some countries, such as Singapore, require that when invoicing a source currency (for example, USD), the tax amount and the exchange rate used be shown on the invoice in the currency of the country (for example, Singapore).
Since taxes are remitted to the taxing authority in the reporting currency, tax tracking will reflect the information for this reporting currency. General Ledger entries will be in the reporting currency for remitting and audit purposes.
To add or edit a tax group: