53 days
Estonia: OSS quarterly VAT return due by the end of the following month
Next: 31 October 2026then 31 January 2027, 30 April 2027
Estonia-registered companies selling goods or digital/other services to consumers in other EU member states whose combined cross-border B2C turnover exceeds €10,000 a year and who use the OSS Union scheme instead of registering for VAT in each customer's country.