Allow to include amount to compensate from previous periods on 303 report
If a company have a negative result in the 303 report this amount can be compensated in the reports of the next periods. This amount is reported by using the key 67 [1]
Companies usually compensate this amount in the next declaration but it may be the case that it's not compensated on the next one but on another one. This is normally because the next declaration is also negative and there is nothing to compensate.
This makes the calculation of the amount to be compensated complex so it's better to let the user enter the amount manually.
[1] https://www.agenciatributaria.es/AEAT.internet/en_gb/Inicio/Ayuda/Modelos__Procedimientos_y_Servicios/Ayuda_Modelo_303/Informacion_general/Instrucciones_modelo_303.shtml