Please follow the instructions below
STEP 1: Install and activate WPForms Lite or Pro
STEP 2: Click Create Your First Form
STEP 3: Give it a name (example: Contact Form) and then click Create a Simple Contact Form.
STEP 4: Make any changes to the simple contact form and click SAVE
STEP 5: Verify changes and click EMBED
STEP 6: copy the SHORTCODE.
STEP 7: Close and go back to WP Admin
STEP 8: Go to Theme Options > Contact Page
STEP 9: Under Contact Page select Form
STEP 10: Under Contact Page Provider select WPForms Lite
STEP 11: Paste the SHORTCODE copied in STEP 6 from WPForm
STEP 11: Click Save Changes
STEP 11: Click Save Changes and now check your new contact us form on the frontend.
Enjoy! You are all set.