Hello,

You do not have to declare any income nor pay taxes as you ar on a student visa and not a residence permit, but as you said in a non profit organization. You are a temporal resident. As you have provided with the IRV certificate that indicates you are a fiscal resident in another country, you will not be requested to pay Taxes in Spain.

In relation to the question about the ingdirect bank account, you can only open a non-resident account, and check with the bank if you can still enjoy the offer.

Regards,