Based outside of Greece: €0, you’re liable as soon as you sell to customers in Greece. Based in Greece: Sales exceeding €10,000 a year.
Yes. You owe tax for the sale of cloud software subscriptions to customers in Greece.
Yes. You owe tax for the sale of software downloads to customers in Greece.
Yes. You owe tax for the sale of eBooks to customers in Greece.
Yes. You owe tax for the sale of digital downloads to customers in Greece.