Hey, @smartinvestment123 - welcome to the Community 
Accenture is a company based in Ireland, and the ordinary tax rate is 25%. When it comes to dividends, we replicate the tax rate applied by our intermediary, and this case is no exception.
When it comes to the payment received by Freetrade, I’m unable to confirm what is the reason for them to treat the payment as tax-exempt. In this case, it will be best to contact them for further information.