Update current detraction percentage based on the latest revision of the law

[davide-aloi]

I believe that with the latest revision of the regulation the amount of tax relief has been decreased from 70% to 50%. It would be beneficial to update this, or let the user define the percentage.

(amazing work btw)

[hipoglucido]

Indeed, since 2025 there are new changes and it would be great to be able to keep using tis website! Not only it changed to 50% in general, but also with the option to be 60% instead if you have a kid with you.

So I agree letting user define the percentage with be a great addition