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I assume you would like to update or create a contact that has a label on it in your Infusionsoft depending on the selected radio button, is that correct?
I'm not familiar with adding tags in Infusionsoft, but I see that in Zapier it allows triggers and actions to add tags. You can check it here: https://zapier.com/zapbook/infusionsoft/jotform/.
Do let us if that's something that can work for you.