Thanks for reaching out to Jotform Support. Unfortunately, our Spanish Support agents are busy helping other Jotform users at the moment. I'll try to help you in English using Google Translate, but you can reply in whichever language you feel comfortable using. Or, if you'd rather have support in Spanish, let us know and we can have them do that. But, keep in mind that you'd have to wait until they're available again.
Now, let me help you with your question. Yes, you will need to create a form, so that the data from the Excel file you will upload from the Import Tool will be imported to that form's submission table.