On 11 December 2020, Bulgaria published in the Official Gazette the Law on Amendments to Tax and Social Insurance Procedure Code, which contains measures for the introduction of new penalties in relation to the payment of withholding tax and certifying the grounds for the application of a tax treaty. This includes that for persons that fail to pay or underpay withholding tax by the deadline for the payment of tax, without certifying the grounds for the application of a tax treaty, a penalty in the amount of 5% of the amount of the unpaid tax will be imposed, up to...