Energy Minister Angus Taylor has rejected claims he failed to disclose an indirect shareholding in a private company, in another Labor assault after a political storm last week over his use of a false document to attack an opponent.

Mr Taylor assured Parliament he had disclosed his financial affairs as required under the law, even though his disclosure does not specify the stake in private company GFA F1 and refers only to one of its shareholder companies.

Minister for Energy and Emissions Reduction Angus Taylor. Credit:Alex Ellinghausen

Attorney-General Christian Porter was also caught up in the political attack when Labor challenged him to explain his part in a phone call Prime Minister Scott Morrison made to NSW Police Commissioner Mick Fuller last week about an investigation into Mr Taylor and a false document used to attack Sydney lord mayor Clover Moore.

Mr Porter defended the phone call as "totally appropriate" despite warnings from former NSW Independent Commission Against Corruption commissioner David Ipp and former counsel assisting the commission Geoffrey Watson that the phone call should not have been made.