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Please do let us know if you have any additional questions or parts that are not clear after checking my reply and we would be happy to add to it.
Now, before adding the Form Tabs widget, you should first make your form a multiple page form.
To do that, I recommend taking a look at the following guide: How to Create Multi Page Forms
As you create your form and set the page breaks where you want them, you should then add the Form Tabs widget to your form.
What happens is that it will turn all of those page breaks into the place where tab is to be used, so you now get tabs that show the same pages.
Depending on what you would like to accomplish there are several different options that you can set in the Form Tabs widget.
To add it to your form, you can check the following guide: How to Add a Widget to your Form
Now since you have opened a thread, I do believe that you are experiencing some issues, so next to the above to ask us any questions that you might have, do let us know if you have any issues setting this up and we would be happy to assist.