To avoid an unpleasant surprise, you should check your tax card regularly and ensure that the information is up to date. Remember to report changes in income, wealth or deductions, so that you pay the correct tax throughout the year.

The best approach is to pay the correct amount of tax, so you neither face an unpleasant surprise nor give the state an interest-free loan. If you are unsure, it may be better to pay slightly too much and receive money back later, rather than risk having to pay additional tax.