In a Which? investigation, 29% of calls to HMRC were cut off because the tax helplines were too busy. The average wait to get though was 18 minutes.
George Osborne has announced an overhaul of stamp duty, which will see millions of homebuyers benefit from a reduced tax bill.
Personal allowance (income you can keep tax-free) will rise to £10,600 for 2015-16. Mr Osborne said he hoped to further increase this- to £12,500 by 2020.
George Osborne faces demands from his own benches for a cut in the number who pay 40% tax, while the opposition have pledged to reintroduce a 10% starting rate
George Osborne has been urged to scrap the 40% tax rate in this year's Budget and replace it with a 45% bracket for those earning more than £65,000
George Osborne faces a mounting tide of calls for tax cuts, ranging from air passenger duty, fuel duty and VAT on housing renovation, to energy taxes and CGT
Conservative MP, Ben Gummer, has suggested that National Insurance should be renamed 'earnings tax' and eventually merged with income tax.
Income tax looks set to be a key Budget 2014 issue, with shadow Chancellor Ed Balls calling for an increase to 50% as thousands more are taken out of tax.
Personal allowance could raise above £10,000 in the 2014/15 tax year, under plans revealed by Nick Clegg.
The very last deadline for self-assessment tax returns is midnight on Friday 31 January. Miss this and you face an automatic £100 fine.