Mr Taylor has previously rejected the suggestion that he or any of his staff changed the document.
He insisted in Parliament that he relied on a document downloaded from the City of Sydney website in which he claimed the council spent $15.9 million on travel for its councillors when the real costs were less than $6000.
The City of Sydney cited its own computer metadata to insist the document used by Mr Taylor could not have been downloaded from its site,raising questions about who authored the false information and how it came to be in Mr Taylor's office.
Loading
Government sources toldThe Sydney Morning Herald andThe Age that Mr Manuatu would not be leaving Mr Taylor's office.
NSW Police has launched Strike Force Garrad to investigate Mr Taylor's role into the scandal after Labor referred the matter last month.
Mr Taylor later apologised to Cr Moore and has conceded that he used incorrect numbers over her travel expenses and carbon emissions,but had continued to deny his office forged a false document.