If I want to have a Flash Sale, what do I do to get paid? Do I use my square account or should I use JotForm?

Do I use my square account or should I use JotForm?  What is the difference?  I have a squareup account, but not a JotForm account?

You can create a JotForm account here.

JotForm offers multiple payment integrations with Square so you can receive payments through your forms.

Please follow the guide below on how you can get this done:

How-to-Integrate-Form-with-Square