Based outside of Portugal: €0, you’re liable as soon as you sell to customers in Portugal. Based in Portugal: Sales exceeding €12,500 a year.
Yes. You owe tax for the sale of cloud software subscriptions to customers in Portugal.
Yes. You owe tax for the sale of software downloads to customers in Portugal.
Yes. You owe tax for the sale of eBooks to customers in Portugal.
Yes. You owe tax for the sale of digital downloads to customers in Portugal.