Check and fill field

Hi,

Is there way to set up a check box and be able to fill a field next to the check box? Example check box a item listed and then fill  serial number when checked marked.

You can add an Other option to check box field. You can split your check box options in multiple fields and add an other option for the serial number to all fields.

You can also add multiple text box fields to your form, one for each item and then potion those fields next to check box options. 

How to Position Fields in JotForm

Most likely, you will also have to use CSS to position the fields. 

How to Inject Custom CSS Codes

Another way is to use two separate Input table fields, one with check boxes and one with text boxes and to position the in the same row.