Conversion of XLS form into X form

Hello community,

After developing and building the tool from Microsoft excel, the three worksheets and inputting all the data. I have become stuck on how to continue.
How do I convert the Excel files into the ODK X form?
What could be a simpler way.
I am just introduced into building and designing survey questionnaires, so any help provided will be appreciated. describes the various options to do the conversion.