Estonia: packaging excise duty (pakendiaktsiis) declaration due by the 15th, quarterly
Confidence: likely, not fully verified. EMTA's excise-duties page confirms packaging excise duty exists and is EMTA-administered (Packaging Excise Duty Act), but this session could not fetch the dedicated packaging-excise page to independently confirm the exact quarterly 15th-of-the-month filing day (sourced from the Gemini audit, itself rated 'verified'). Generally, businesses that place packaging on the Estonian market and fulfil their recovery obligation through a licensed packaging recovery organisation (taaskasutusorganisatsioon) are exempt from paying the duty itself, though a declaration/registration duty may still apply -- this distinction needs a follow-up check with a real browser against emta.ee.
E-commerce and other companies that import or package goods and place packaging on the Estonian market without full coverage from a recovery organisation contract.