i want formula if the month in which the bill created not equal to current month the user can not edit the bill

AI generated answer (using internal Slack threads):

To prevent a user from editing a bill if the month in which the bill was created is not the current month, you would need to create a SuiteScript that checks the date of the bill and compares it to the current date. Here is a basic example of how you might do this:

javascript
/**
 * @NApiVersion 2.x
 * @NScriptType UserEventScript
 */
define(['N/record', 'N/runtime'], function(record, runtime) {
    function beforeSubmit(context) {
        if (context.type !== context.UserEventType.CREATE && context.type !== context.UserEventType.EDIT) {
            return;
        }

        var bill = context.newRecord;
        var billDate = bill.getValue('trandate');
        var currentDate = new Date();

        if (billDate.getMonth() !== currentDate.getMonth()) {
            throw new Error('You cannot edit a bill that was not created in the current month.');
        }
    }

    return {
        beforeSubmit: beforeSubmit
    };
});

This script will throw an error and prevent the bill from being edited if the bill's date is not in the current month. Please note that this script should be deployed as a User Event Script on the Vendor Bill record. ****** Disclaimer: This response was generated by an artificial intelligence assistant based on previous conversations from multiple Slack channels, and may contain inaccuracies or mistakes. ******