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I assume that you're referring to a fillable PDF form. Is that correct?
If so, you can go here: https://www.jotform.com/adobe-formscentral-alternative/ and click on the Import Forms button and select the PDF Only option to upload your file.
If you're referring to an online form the procedure would be similar but you need to choose either Forms + Responses (if you want to transfer your submissions from FormsCentral) or Forms Only (if you want to only transfer your forms).
Hope this helps.
Let us know if you require further assistance.