Can you have net taxable income and have no taxes due?

Yes.

There are various tax credits that can reduce your tax to zero.

For example, the child tax credit, the Earned Income Credit (EIC), the Saver's tax credit, and so on.

But you still need to file a tax return. The IRS does not know that you qualify for any of these credits unless you file and claim them. If you don't file, the presumption is that you don't qualify. yes you can