Auto-fill fields based on a list

We have 400 doctors, I'd like to pre-populate the Email Address field when I select the doctor's name.

Greetings.

You can use calculation values and conditional logic to automatically fill the email value.

You can assign calculation values from the dropdown properties:

Then you will need Update/Calculate field condition:

Here, you need to check if the dropdown is filled, and if so, copy the value from the dropdown to the desired email field:

I've created a test form for you at the following link:
https://form.jotform.com/210542234448046

Freel free to test it and clone it to your account to see conditional logic.

You can learn more at the following links:

• How to Assign Calculation Value
• How to Pass Field Value to Another Field?
• How to Clone an Existing Form from a URL

Let us know if you have any additional questions.