The tax return is pre-filled for most individuals, but review it carefully. At assessment, taxes are calculated based on the information in the tax return.

Report cyberattacks or crimes to the appropriate authorities, such as the Data Protection Authority, CERT-IS, or the police, to ensure proper action is taken.

If there are any changes in where you receive wages or pension payments from, it is important to ensure the correct use of the personal tax credit and brackets.