Organisers of the protest in Market Square said they hoped deputies would listen to concerns.
Politicians said it was important jurisdictions worked together on issues around transparency.
Andy Burnham has spoken about reforming stamp duty and council tax - what do experts think he might do when he becomes PM?
Hospitality firms fear the introduction of a consumption tax will raise costs and reduce tourism.
Businesses welcome a temporary VAT cut, but not all say they can afford to reduce ticket prices.
Politicians discuss their positions on P&R's tax reform proposals, which face 21 amendments.
A number of independent schools are either closing or experiencing financial troubles.
Deputy Aidan Matthews says the only way he may support a GST is if food is exempted.
The report from the comptroller also says progress to improve efficiencies is slow.
