Here are a few options for the WordPress post tag description for “累進稅率” (Progressive Tax Rate), in Traditional Chinese, with varying levels of detail:

**Option 1 (Concise):**

> 了解累進稅率：稅率隨著收入增加而遞增的稅制。 涵蓋原理、優缺點與實例。

* (Translation: Understanding Progressive Tax Rates: A tax system in which tax rates increase with income. Covering principles, advantages, disadvantages, and examples.)

**Option 2 (More Detailed):**

> 累進稅率 (Progressive Tax Rate) 的相關資訊索引，分析稅率如何根據收入水平向上調整。 說明其運作原理、對經濟與社會的影響，以及與其他稅制的比較，如單一稅率和定額稅。 包含台灣稅務實例，提供稅務規劃參考。

* (Translation: An index of information related to Progressive Tax Rates, analyzing how tax rates are adjusted upwards based on income levels. Explaining its operating principles, the impact on the economy and society, and comparisons with other tax systems such as flat tax and regressive tax. Including practical examples from Taiwan’s tax system to provide a reference for tax planning.)

**Option 3 (Focus on Resource):**

> 此標籤下收集關於「累進稅率」的相關文章與資源。 探索累進稅率的稅務原理、計算方法，以及各國實施狀況。 適合對稅務、財經議題感興趣的讀者。

* (Translation: This tag gathers related articles and resources about “Progressive Tax Rates.” Explore the tax principles of progressive tax rates, calculation methods, and implementation status in various countries. Suitable for readers interested in tax and financial topics.)

**Option 4 (Simple & Keyword Heavy):**

> 累進稅率、稅收、所得稅、稅制、累進稅制、稅務、財經、台灣稅務

* (Translation: Progressive Tax Rate, Taxation, Income Tax, Tax System, Progressive Tax System, Taxation, Finance, Taiwan Tax)

**Which option to choose depends on:**

* **Your target audience:** Are they general readers or experts?
* **The overall tone of your blog:** Is it casual or formal?
* **SEO considerations:** Option 4 is keyword-focused for search. Options 2 and 3 provide a better balance of relevance and audience engagement.

I’d recommend adjusting Option 2 or 3 based on your specific blog’s needs. Remember to choose the most relevant and descriptive option to help your users understand what content falls under this tag!