If you want to add ConvertKit form in AMP then first you need to purchase and install Opt-in Forms for AMP plugin.
After installing you will find this option in WordPress Dashboard -> AMP optin -> Add New optin -> select “ ConvertKit ” option -> now you need Form ID.
Follow the simple steps to get all this ID’s from ConvertKit Account.
Step 1: First of all Signup/login at ConvertKit
Step 2: After creating and styling the form, Go to Embed and copy the ID as shown in below image
Step 3: Now create a new AMP Opt-in

Step 4: Now select ConvertKit from the Dropdown and enters the form ID and copy the shortcode and place where you want to display the ConvertKit Form.
The Output of the ConvertKit form in AMP
Make sure you need to fill this form and then click on the submit button after that you will get the “Subscription successful” message.
For more detail See this Video how to Create ConvertKit form.
That’s it for this tutorial!
We hope it helped you. If you have any feedback or questions, then please share them in the comments section below.