1) Find the form you would like to disable.
2) Find the Limit Checkouts section and choose Yes to the question “Limit checkouts on this form?”
3) Click in the Disable Checkout On section and choose a date in the past
4) Click the Save & Finish or the Save button
5) Your form will be disabled and payers will not be able to check out on the form. You can always return and re-enable the form by choosing a date in the future.