Step 1: Add the A/B Testing tool to your form, and name your "B" variant to create the test.
Step 2: Modify your "B" variant by tweaking a field, the submit button, or another element.
Step 3: Activate your test, wait for submissions, and compare the forms against each other.
To learn more about setup, please read this Help article. You can also check out the video below to learn how to test you way to a higher conversion rate.