Turbo tax 2023 does not allow for a zero in the 1095-A part III column B. However, that is exactly what I have on my downloaded 1095-A . What should I enter?

You should enter a blank space.

Do not include a (0) zero on the 1095-A.

Please contact us again with any questions, and provide some additional details.

Unfortunately, I cannot enter a blank space, or leave it blank because it requires a numeric value greater than zero.

In that case, use $1.  It will serve as a place holder, and it will not have any effect on your tax return.