Here are a few options for the WordPress post tag description, with varying levels of detail and focus:

**Option 1: Concise and Direct**

* **Description:** 了解您的免稅權益。 (Understand your tax-free allowances.)

**Option 2: Slightly More Informative**

* **Description:** 關於個人所得稅的免稅額，包括基本免稅額、扣除額等。 (About tax-free allowances for personal income tax, including basic allowances, deductions, etc.)

**Option 3: Keyword Driven (Good for SEO)**

* **Description:** 台灣免稅額、所得稅、扣除額、免稅項目。了解個人所得稅的各種免稅額，最大化您的退稅金額。 (Taiwan tax-free allowances, income tax, deductions, tax-exempt items. Understand various tax-free allowances for personal income tax and maximize your tax refund.)

**Option 4: Focusing on the User’s Benefit**

* **Description:** 掌握免稅額知識，合法節稅，增加您的可支配收入。 (Master tax-free allowance knowledge, legally save on taxes, and increase your disposable income.)

**Option 5: A More General Approach**

* **Description:** 此標籤涵蓋與台灣免稅額相關的所有內容。查找有關基本免稅額、扣除額和其他稅務優惠的資訊。 (This tag covers all content related to Taiwan’s tax-free allowances. Find information on basic allowances, deductions, and other tax benefits.)

**Which one is best depends on your target audience and the overall tone of your blog. Consider:**

* **SEO:** If you want to rank well for related keywords like “台灣免稅額,” Option 3 is generally the best for its keyword use.
* **Readability:** All options are clear, but some are slightly more conversational (like Option 4).
* **Your Blog’s Focus:** Choose an option that aligns with the types of articles you write about the “免稅額” topic.

I would generally recommend **Option 3 or 4** for a solid balance of keywords and user benefit. Remember to choose the one that best fits the context of your website.