Personal income taxation / IRPF

Good afternoon and wishing you all a merry christmas and a happy new year.

My question concerns the personal income taxation / IRPF how should apply in my case as I am have been offered an expat contrat with gross salary (before tax) and it will be splitted initially in BAHT and Euro.

Mi pregunta se refiere a como se aplica la declaracion del IRPF para expatriados con nómina de expatriado parte en Euro y parte en baht. Existe alguna exencion de impuestos al estar expatriado?

Gracias/thank you.
Gopa-