Carmarthen East and Dinefwr AM Rhodri Glyn Thomas accused the local government minister of "taking no steps to defend the most vulnerable" on 27 November 2012.
He warned that hundreds of thousands of families in Wales may not receive their council tax benefits next year.
From April 2013 the system will be run by Welsh councils and not the UK government.
According to the local government minister the UK treasury has not provided enough information to implement the scheme.
"If the UK government has any care for the 330,000 families that will be relying on these figures, there is a duty on the treasury to release those figures today so that the assembly can scrutinise the figures," said Carl Sargeant AM.
The assembly may reconvene during the Christmas holidays in order to discuss the figures after they are released by the treasury during the autumn statement.
Conservative AM Byron Davies asked a question relating to the job losses at Tata Steel.
The First Minister Carwyn Jones said it was a "great blow for those who would be losing their jobs".
First it was announced that 600 posts will go at Tata Steel in south Wales, then Paramount Foods in Flintshire confirmed its plant was closing with the loss of 200 jobs.
Liberal Democrat AM Aled Roberts asked a question about the recent flooding in north Wales.
The local government minister said that his team were considering how to improve the A55 to avoid as many problems in the future.
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