Trust distribution to non-resident (distribution paid to non-resident)

Via "Individual Tax Return", press Income > Trust

Select Item 13 "Trust" and fill "Worksheet"

Manually fill the item "Share of credit for tax paid by trustee", then the "Reason the trustee paid tax from trusts" and "Tax credits for tax paid by trustee" will be activated as well. 

Here is the related ATO portal link for your reference-