I fully understand that the donation is NOT tax deductible.

本人完全明白，本次捐赠不能用于抵税。

youdao

At usual times, the entertainment fee includes commercial and individual expense, and the individual expense shall not be construed as business operational expense and is not tax deductible.

但商业招待和个人消费之间通常是难以划分的，国际上的处理办法一般是在二者之间人为规定一个划分比例。

youdao

But, in practice, interest payments are generally tax-deductible; dividends are not.

但在实践中，支付的利息通常是可减税的；红利则不行。

youdao

It's tax deductible, whereas dividends are not.

这是免税的,股利还要征税

耶鲁公开课 - 金融市场课程节选

If I run one business and want to start another, the money I invest in the second business is not tax deductible in any way.

FORBES: Tax on Dividend-Paying Stocks Rising to 74%

The caveat is that they are supposed to pay taxes on their political spending, and the contributions to these groups are not tax deductible as charitable giving (as they are for (c)(3) groups).

WSJ: Review & Outlook: A Tax-Exempt IRS Primer

Then you may be looking at an assortment of savings plans whose contributions are not tax-deductible but whose earnings are tax-deferred.

FORBES: Don't Burn the Mortgage