How to place submit button beside text box field

Almost good enough. Can't put the submit button beside the text field in a way that doesn't look like shit. You should split your columns into thirds, at least.

Can you please provide us ID of your form so that we can inspect your form and assist you?

If you want to place submit button next to the text box field you will need to Shrink both fields in order to achieve that.

Here is a demo form I made where Submit button is beside text box field.

http://form.jotformpro.com/form/51325039923958?

Hope this will help. Let us know if you need further assistance.