I realize this is kind of older, but didn't see a very good reply.

Probably also depends on where in the world you are, and the kind of advice you want. If tax only and in the US, there are registered agents, CPAs that specialize in tax, and tax attorneys. Also lot of the online preparers have an assistance option. For self help, and online preparer and their Q&A and docs, the state or federal tax sites which have tones of docs, searching like you said, and AI too though check anything AI says. Around tax time there are often tax clinics at local libraries or other locations especially for the elderly by maybe wider too.

For other kinds of financial advice, you'd use the kind of advisor you need for example a financial advisor, or an estate or elder law attorney.