hope it helps

I think 'las mismas' refers back to the last feminine plural noun i.e. 'soluciones'. So you could reword the sentance but still capture the meaning as follows: ..... "

"indicating the existing possibilities and those most appropriate for the specific case, with a view to finding the best solution in terms of tax"

Maybe not perfect but just a suggestion. Good luck.

This is what I tell my tax clients - 'I try to get them the best tax treatment by making the tax laws work in their favor.'

An example: A self-employed individual has three ways that education tuition can be treated - as an adjustment to income, tax credit or business expense. The answer will depend on the various types of income the person has.