Hi, im an undergraduate, been trying to do research on taxes , do you know a country with a comfortable database on tax reductions made (it is apparently more rare than you’d think)and not from the US…

For example Finland would have been a great country to do research in but there are allrwady papers on basically every change made there.

Also would really appreciate if there are other scholars here who know more specific places to direct me too in regard to tax research questions…