The questions to Mr Taylor centred on his family company, Gufee, and its stakes in private companies Growth Farms and Farm Partnerships Australia.
While these are disclosed on the parliamentary register of interests, there is no disclosure of the fact the two companies own shares in another company, GFA F1.
Labor energy spokesman Mark Butler said Labor does not know what GFA F1 does and is challenging the minister over disclosure, not the nature of the business or any conflict of interest.
Mr Taylor’s office said he had no controlling interest in Farm Partnerships Australia or Growth Farms or their investments.
“The minister has disclosed his interests in accordance with the rules,” a spokesman for Mr Taylor said.
“The rules require that direct and controlling interests be disclosed and they have been.”
Labor cited its questions about financial disclosure to ramp up its claim that Mr Taylor was caught up in a series of scandals including his use of the false document, a matter that is now the subject of a NSW police investigation.
Mr Porter confirmed he was in the room with Mr Morrison last week when the Prime Minister phoned Mr Fuller to check on the investigation.
Mr Porter said Mr Fuller knew he was on the call and quoted the police chief’s comment last week that similar investigations were a “great diverter” of his time as commissioner.
“The call was totally appropriate,” the Attorney-General said.
“It’s precisely what the Prime Minister undertook to do. He did it. He came back to the House with the response to that call.
“And, indeed, it is precisely the description that Commissioner Fuller has given when he said that absolutely nothing inappropriate occurred in that phone call.”
Mr Taylor also came under fire on Monday from feminist and author Naomi Wolf over his account six years ago of his time as a Rhodes scholar at Oxford University in 1991, when he recalled that Dr Wolf “lived a couple of doors down the corridor” at a time when some students were opposing a Christmas celebration.
Dr Wolf called that account a “fever dream” when it was circulated on Twitter on Monday, pointing out she was at Oxford several years earlier. “I was a Rhodes Scholar in Oxford 1985-88. Angus Taylor recalls me in a fever dream at Oxford in 1991 among those warring on Xmas,” she wrote.
David Crowe is chief political correspondent for The Sydney Morning Herald and The Age.