Turbotax added form 8959 but i am not over the threshold, why?

[JohnW152]

It's difficult to tell without more information.  The threshold amount is computed by combining your Medicare wages and any positive self-employment income you have.  A self-employment loss isn't considered when computing the threshold. 

Here's the tax year threshold chart, from the IRS' Instructions for Form 8959:

See also Who Must File in the instructions linked above.

If your threshold amount is below what's shown above, feel free to post back with more information.