The deadline for filing paper self assessment tax returns is just three weeks away.
Consumers who submit a paper return, rather than sending their filing online, must ensure that HM Revenue and Customs receive their form by 31 October for the 2008-09 tax year. If they send an electronic return, taxpayers have until the end of January 2010.
The self-employed and company directors must submit a self assessment form, or face a £100 fine.
A recent Which? survey found that 54% of members who had filed their return had done so by post. The 46% who file online benefit from an intuitive programme, which calculates tax totals as the e-form is completed, making it easier for users to ascertain what they owe.
Consumers can use the Which? tax calculator to establish the size of their liability.
Which? Money when you need it
You can follow @WhichMoney on Twitter to keep up-to-date with our Best Rates and Recommended Provider product and service reviews.
Sign up for the latest money news, best rates and recommended providers in your newsletter every Friday.
Or for money-saving tips, and news of how what’s going on in the world of finance affects you, join Melanie Dowding and James Daley for the Which? Money weekly money podcast
For daily consumer news, subscribe to the Which? news RSS feed here. And to find out how we work for you on money issues, visit our personal finance campaigns pages.