Make field not editable when a certain checkbox is yes, and editable when no

[MarkMayhrai]

Good day, 

I need some help please; see image.

I'm creating an invoicing program, and have charge types selectable by the user.
Specifically, in our application certain charges are fixed, and some are not.
I have created a YES/NO fixed chare indicator on the charge item and a value.

So for this concept to work, I need some help please to figure out how to:

- If the fixed charge indicator is YES, then the Amount field is to use the value from the charge table, and not allow the user to edit the amount

- If NO, then the Amount field is to be open to allow it to be edit.

See image below in an attempt to allow it to be visualized.

Thank you in advance, 

iMark

[Kurumi]

Hi @MarkMayhrai - You may use Rules in this workflow. You can apply conditional rules to create dynamic change forms that fine tune fields based on user entries or values. For more information, kindly check this link: https://howto.caspio.com/datapages/forms/conditional-forms/