New Rulebooks Provide Detailed rules for Filing Green Tax Returns

The Ministry of Finance has published three new rulebooks establishing the conditions for practical implementation of the new CO₂ taxation system:

• Rulebook on the form, content and method of filing the tax return for the tax on greenhouse gas emissions, the method of exercising the right to a tax credit, and the form, content and method of maintaining records of investments in measures for the reduction of CO₂EQ emissions (Rulebook on GHG Tax Filing);
• Rulebook on the form, content and method of filing the tax return for the tax on the importation of carbon-intensive products, the method of claiming a tax credit, the method of calculating the amount of tax credit, and the documentation required for verification of payment in the country of origin (Rulebook on the tax return for the tax on the importation of carbon-intensive products); and
• Rulebook on the deadlines and data to be submitted by the Customs Authority to the Tax Authority in accordance with the Law on the Tax on the Importation of Carbon-Intensive Products (Rulebook on data submission).

The aforementioned rulebooks enter into force on 23 July 2026.

Rulebook on GHG Tax Filing

The tax return is filed using Form PP EGESB.

Mandatory attachments to be submitted with the tax return

Taxpayers are required to submit the following documents in digital form (PDF/JPG) together with Form PP EGESB:

• verified emissions report (or an assessment issued by the competent authority),
• any amended reports, where applicable,
• other documentation relevant to the assessment of the tax liability.

Separate forms for each installation and consolidated emissions calculation.

The following documents must be attached to the tax return:

• Form PIE – Information on Sources of Greenhouse Gas (GHG) Emissions by Installation; an
• Form OUE – Calculation of Total Emissions for the Entire Tax Period.

These forms serve as the basis for determining the quantity of CO₂eq subject to taxation.

Tax credit for investments in emission reduction measures.

The taxpayer is required to maintain detailed records of financial resources invested in measures and activities resulting in the reduction of CO₂eq emissions.

Records should be maintained separately for each project or measure, in either paper or digital form.

VAT is not included in the total amount of investments where the taxpayer is entitled to deduct input VAT.

The following documentation is submitted together with the tax return:

• PK-1 – Detailed Breakdown of Investments/Projects;
• PK-2 – tax credit calculation (total amount of investments and the amount of the tax credit utilized in the relevant tax period).

Rulebook on the tax return for the tax on the importation of carbon-intensive products

The tax return is submitted using Form PP UUIP.

Form UP – mandatory attachment to the tax return

Form UP must be submitted together with the tax return and contains a schedule of imported carbon-intensive products by supplier and product tariff classification code, in accordance with the customs tariff nomenclature.

The form contains information on the quantity of imported products, the method used for determining emissions, emissions per unit of product, total emissions, reference emissions, emissions subject to taxation, the tax liability before reduction, and the amount of the tax credit.

Tax credit for the carbon emissions price paid in the country of origin.

The amount of the tax credit is calculated on the basis of the amount paid in the country of origin of the product, converted into Serbian dinars using the middle exchange rate of the National Bank of Serbia applicable on the date of payment.

The amount of the tax credit may not exceed the amount of the tax that would have been payable had the product been manufactured in the Republic of Serbia, nor may it exceed the total amount of tax liability reported in the tax return for the relevant tax period.

The documentation required to substantiate entitlement to the tax credit includes:

• a verification report on CO₂eq emissions; and
• a certificate issued by the competent authority confirming payment of the emissions price in the country of origin,

with data that clearly links the imported product, the installation in which it was produced, the quantity of emissions, and the corresponding payment made.

Documentation in a foreign language must be translated into Serbian by a certified court interpreter.

A taxpayer claiming a tax credit is required to submit Form PK – Tax Credit Calculation. This form is completed where the taxpayer exercises the right to a tax credit or has an unused tax credit carried forward from the previous tax period.

Rulebook on data submission

The Customs Authority is required to submit electronically to the Tax Authority, no later than the 10th day of the current month for the preceding month, data from the Single Customs Document relating to the importation of carbon-intensive products, including the following:

• the tariff classification code under the customs tariff nomenclature,
• description of goods,
• quantity and unit of measure,
• country of origin,
• customs value of the goods
• number and date of the SCD
• information on the importer, the customs office, and the authorized customs procedure,
• as well as other relevant information.