It depends.

What are you trying to do? 

Overriding entries in the forms is not recommended as it could disrupt the calculations performed by TurboTax. 

Overrides in TurboTax

Entries should only be made in the input section to ensure the program works accurately.

What box?  Why?

There is almost NEVER a reason to override.

No; it did not answer my question, but I found another workaround.

I certainly recognize that overriding the program is generally frowned upon but is sometimes essential. The program would be more useful to me if I had the option to override whatever field I needed to.

Exactly what is "essential".

We cannot answer your question because you did not tell us what you are trying to override  - how to do it depends on what it is.

This particular issue was box 16 on schedule 1 (which flows tot eh 1040WKSHT).

That is entered in the business expenses section - no override is necessary.

It depends on the type of business but most Schedule C business can be entered as in example.

macuser_22 has shown you exactly how to enter the self-employed health insurance deduction the "right" way (i.e. no override needed).

But note that TurboTax may have to limit or eliminate this deduction based on your Schedule C income and/or your self-employed SEP, SIMPLE, and qualified plan deduction.

Is your issue that you entered the health insurance deduction in the interview but nothing appeared on line 16 on Schedule 1 (1040)?

Close, but I do not file schedule C. Applicable because I am a part-owner of an S corporation; that did not come up at all in the interview.

That is basically what I did through the forms.  thanks.

That's fine, except that the act of overriding voids the Tax Accuracy Calculation Guarantee. That's why we strongly encourage users to not override anything except in the most extreme cases.