How do I pay my taxes? SISTEMA July 14, 2021 08:42 Updated Click on "See all procedures" and in the Treasury section > Taxes, Duties and Social Security, choose the one you want. Related articles How do I pay my taxes? How do I pay my taxes? How can I obtain the Complete Reference Number (NRC in Spanish)? How do I pay a SUMA tax? What is my username and password to access my new Sabadell Online account online? Comments 0 comments Article is closed for comments.