According to HM Revenue and Customs (HMRC).
They are now faced with a penalty of at least £ 100 for missing the break at the end of the day on Friday, said tax authority, unless they can provide a valid excuse for not having deposited.
More than 11.5 million people have completed the self-assessment process, including more than 31,000 people who finished it during the last hour before the deadline.
People who are independent or who have more than one source of income are among those necessary to produce a income tax return each year.
Most also make sure they pay or organize payment of the tax due. However, some seeking their tax on Friday may have to face a greater stress following computer problems at Barclays.
Although it may have caused frustration and panic, most would not need to pay the tax before the beginning of March, so would not be condemned to a fine accordingly – assuming they have completed the self-assessment process in time.
For those who have missed the deadline, financial penalties include:
An initial penalty of £ 100, even if there is no tax for daily remuneration penalties of £ 10 per day after three months, up to a maximum of £ 900 after six months, an additional penalty of 5% of the tax due or £ 300, what is the most than 12 months, the highest of 5% of the tax due or the costs of £ 300
“I urge anyone who missed the deadline to submit his return as soon as possible to avoid other penalties,” said Myrtle Lloyd, Director General of HMRC for customer services.
There are also fines for late payment of the tax due, with more added interest.
Calls against a fine can be made either by depositing in a form or by writing a letter to the HMRC, but a self-assessment must have been completed before calling.
HMRC recently denied having managed a “deliberately poor” telephone service in order to push taxpayers to request online help instead.
The Chief Executive Officer Jim Harra said that the claims of a committee of deputies about his customer service were “completely baseless”.
The new rules mean that this time, for the first time, online platforms such as Ebay and Vinted must speak to HMRC information on sales of people selling 30 or more articles or which have won at least £ 1,700.
The authority will assess these details in relation to the declarations of individual income.
The rules, which entered into force in January, do not mean that there are new tax costs for these sellers, but that more information is shared to ensure that they pay the amount of correct tax .