We bought property in Puntarenas and are trying to pay our property taxes online. Does anyone have any advice on how to use the registronacional website?

hmmmmmmmmmmmmmm, did not know property taxes could be paid online. We just paid ours by going to the local municipalidad offices. We live in Esparza which is in Puntarenas province. Very fast and easy.

Sorry I can't help you with online payment. On that registro site, if you have your property folio number, perhaps that is how you can begin.

The national registry is not involved with collection of property taxes. The local municipalities collect the property taxes.
You can pay your property taxes on-line with an account at Banco de Costa Rica.