How to use one box for first and last names?

I'm sorry, but I don't understand your concern. Would you mind clarifying it to us by providing more details?

If you want to combine first and last name on the same box, you can replace the field with Short Text Entry field.

Looking forward for your response.  

When I crest a form and enter a section for client “name” it gives me two boxes “first” and a 2nd box for “last” I would much prefer one box for both “first and last”.
Mainly because I am having an issue formatting my forms. I tried to tighten up all fields and ended up with the information in my text and drop down boxes shrunk down.
I am trying to make a form to keep tract of calls and client interactions. I tried to create a drop down list asking if there is another form needed so if I click “yes” the same fields above Show up again below and ready to be filled out.
Lastly is it possible to track info from this sheet and use the calculation on a different form. For instance; tracking hours from each log, I would like to total these hours on a summary report sent weekly bi-weekly
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Thank you for providing additional information.

When I crest a form and enter a section for client “name” it gives me two boxes “first” and a 2nd box for “last” I would much prefer one box for both “first and last”.

In this case, you can use the suggestion provided by my colleague above and use the Short text entry field instead of the Name field.

I tried to create a drop down list asking if there is another form needed so if I click “yes” the same fields above Show up again below and ready to be filled out.

Were you able to achieve this or do you need any further assistance regarding this flow?

Is it possible to track info from this sheet and use the calculation on a different form. For instance; tracking hours from each log, I would like to total these hours on a summary report sent weekly bi-weekly.

You can pass on value from one form to another - https://www.jotform.com/help/351-How-to-Automatically-Pass-Form-Data-to-Another-Form

Then use a Form calculation widget in the final form to calculate the required data - https://www.jotform.com/help/259-How-to-Perform-Form-Calculation-Using-a-Widget 

Do review and let us know if you have any further queries.