Insolvency adviser Begbies Traynor slashed its expectations for the year after a poor third quarter for its tax division, causing its shares to plunge on Thursday.The tax division has seen reduced demand for tax planning services and transactional tax services, it said.This has primarily been due to a "tougher stance towards tax planning activities adopted by the Government and HMRC", and a "weak economic recovery," according to the group.While net debt remains 'in line', Begbies announced that actions to restructure the insolvency, tax and support areas will result in exceptional costs of £3m. The group expects these actions to save around £2m a year going forward."We have taken strong action to realign costs to enhance profitability at current levels of activity, following the disappointing trading performance in the year to date," said executive chairman Ric Traynor.