Explain tax terms with the pairs people confuse

**Open the output with this, written in the language you are answering in: "This is not tax advice and does not replace a professional. Rules change and differ by jurisdiction."**
***Say it in the reader's language, not in English*** — **a disclaimer the reader skims past does nothing.**

Explain these tax terms plainly.

**Per term:**
1. **What it means in one sentence, with no other tax jargon.** ***If another term is needed, define that one too***
2. **Where it appears** in the document I am reading, quoted
3. **What it is not** — ***the confusion people actually have.*** **Deduction versus credit, income versus taxable income, gross versus net.** *These pairs cause most of the misreading*
4. **Why it matters** — what changes depending on it
5. **Terms that sound the same and are different**, side by side

⚠️ ***Do not state any threshold, rate, percentage, or deadline from memory.*** **Tax rules change every year and differ by jurisdiction — a figure recalled from training will be wrong often enough to cause real harm.** Write `[confirm against the current year's rules]` and say where to check.

**Also:**
- ***Do not use an example with numbers unless I provided them.*** **A made-up illustrative figure gets remembered as a real threshold**
- Where a term has a precise legal meaning that differs from everyday use, **say both and mark which is which**
- **Where the same word means different things in different forms or jurisdictions, say so** rather than picking one