Here are a few options for the WordPress post_tag description in Traditional Chinese, ranging in detail and tone:

**Option 1 (Concise and Direct):**

> 集中討論任何與境外收入相關的文章，包括收入申報、稅務規定、以及國際理財策略。

* **Translation:** Covers all posts related to overseas income, including income declaration, tax regulations, and international financial strategies.
* **Best for:** A clear and functional description.

**Option 2 (Slightly More Detailed):**

> 關於您在海外賺取收入的資訊集散地。在這裡，您可以找到關於跨國稅務、匯款、投資、以及如何有效管理您的境外收入的實用建議。

* **Translation:** Your information hub for earning income overseas. Here you can find practical advice on cross-border taxation, remittances, investments, and how to effectively manage your overseas income.
* **Best for:** A description that attracts users seeking practical help and advice.

**Option 3 (Emphasizing Legal Compliance):**

> 深入探討海外收入申報的各個方面。本標籤內的文章涵蓋了稅務合規性、法律要求、以及避免稅務問題的策略，助您安心管理海外收入。

* **Translation:** Explore all aspects of overseas income declaration. Articles within this tag cover tax compliance, legal requirements, and strategies for avoiding tax issues, helping you manage your overseas income with peace of mind.
* **Best for:** Appeals to users concerned about legal/tax implications.

**Option 4 (More Informative):**

> 了解有關海外收入的所有資訊。從申報流程、稅務減免，到如何在不同國家管理財產，以及國際理財策略，我們提供一系列相關文章，幫助您全面了解及有效利用海外收入來源。

* **Translation:** Learn everything about overseas income. From the declaration process and tax deductions to how to manage assets in different countries and international financial strategies, we provide a series of related articles to help you understand and effectively utilize your overseas income sources.
* **Best for:** A comprehensive description aiming to attract readers with a broad interest in the topic.

**How to Use This in WordPress:**

1. **Go to your WordPress Admin Dashboard.**
2. **Navigate to “Posts” > “Tags” (or “Categories” depending on how you’re using the tags).**
3. **Find the tag “海外收入” (or add it if you haven’t already).**
4. **In the “Description” field, paste one of the options above.**
5. **Click “Update Tag” (or “Save Tag” if new).**

Choose the option that best reflects the content of the posts you’ll be tagging with “海外收入” and the overall tone of your website/blog. Good luck!