The Federal Government has confirmed next week's meeting of treasurers to discuss tax policy has been postponed.

A spokesman for the Prime Minister said the treasurers would instead meet in April.

They will hold talks alongside the premiers and chief ministers as part of the COAG process.

"State treasurers and the Federal Treasurer were due to meet on March 11," Mr Turnbull told reporters this morning.

"What we are having is a combined meeting of premiers and treasurers on April 8 instead."

Soon after, Federal Treasurer Scott Morrison's office released a statement saying the meeting had been "rescheduled".

Opposition Leader Bill Shorten said Mr Turnbull had been "paralysed".

Mr Shorten called on the Prime Minister to outline his economic plans.

"We've outlined our policies," Mr Shorten said.

"Malcolm Turnbull's been basically paralysed by a worry about losing popularity ... Malcolm Turnbull is gradually getting corralled and moved into bringing down a budget which just involves a lot of cuts.

"It's time for Malcolm Turnbull to explain his economic plans to Australia."

West Australian Treasurer Mike Nahan said he was extremely disappointed the meeting had been cancelled.

He said the Federal Government's inaction on tax reform had become a source of frustration.

"They've put a stop to all the debate, a stop to all the work, and they need to get on with it in my view," he said.

"We need Commonwealth leadership and it doesn't appear that the Turnbull Government is willing to do it.

"We will continue to express our views to the Treasurer and to the Prime Minister that tax reform and reform of the GST is absolutely imperative."