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As far us I understand from your thread you want to autofill the information for your other field.
I will describe you with example.
Unfortunately, we don't have this feature on Jotform. However, we can fix that issue with conditions.
First of all, choose UPDATE / CALCULATE FIELD option on conditions.
Then, make the arrangements as you see below:
At that time, it will copy the field's value to desired field.
Here is how it works:
If you have any question or issues, please do not hesitate contacting us. We will be glad to assist you.