This sounds like you want a magic solution.

You want to find your "tax" related things. Each time you create something, you put it in the "tax" directory. The same with photos: you organize them once in the input stage or periodically, and then you can search for them easily later on.

For text, if the content of the file is what is relevant, grep/ripgrep are your friends.

File type/name, find/fd are your friends.

Date of creation? A combination of ls and find.

For image, video and sound it is more difficult (impossible?) to search by content.

File names and directories are simple, and it works as well as you make it work; it does not matter the type or content of the file.