Can I get a tax refund from Dongguan to Macau?

There is no tax refund from Dongguan to Macau.

You can't enjoy tax refund when traveling from Dongguan to Macau. Generally speaking, tax refund refers to the part of the tax paid by travelers when they leave a country or region that they can apply for refund of the goods purchased in that country or region according to relevant regulations. However, Dongguan is a city in mainland China, while Macau is a special administrative region of China. There are differences in tax policies between the two. Since Macau is regarded as an outbound tourist destination of China, rather than an outbound tour, you can't enjoy tax refund from Dongguan to Macau.