How do I refund the tax on an invoice?

AI generated answer (using internal Slack threads):

To refund the tax on an invoice in NetSuite, you would need to create a tax-only credit. This is not a straightforward process as NetSuite calculates tax based on a percentage of the line item, not a fixed dollar amount. However, you can follow these steps: 1. Create a new item with the type "Other Charge for Sale" and set the tax schedule to the same as the original item. 2. Create a credit memo for the customer, add the new item, and set the amount to the tax amount you want to refund. 3. Apply the credit memo to the original invoice. Here is a link to the NetSuite Knowledge Base that provides more details on this process: [How do I add a tax-only credit in NetSuite?](https://help.avalara.com/Frequently_Asked_Questions/NetSuite_-_Knowledge_Base/How_do_I_add_a_tax_only_credit_in_Netsuite%3F) If you are dealing with a cash sale rather than an invoice, the process might be slightly different. You might need to create a customer refund. Here is a sample SuiteScript code for creating a customer refund:

javascript
var ref = nlapiCreateRecord('customerrefund', {entity:996,customform:41});
for(var i = ref.getLineItemCount('apply'); i>0; i--){
    if(1189 == ref.getLineItemValue('apply', 'doc', i)){
    ref.setLineItemValue('apply', 'apply', i, 'T');
    ref.setLineItemValue('apply', 'amount', i, ref.getLineItemValue('apply', 'due', i));
}
console.log(
i +' '+
ref.getLineItemValue('apply', 'doc', i) +' '+ 
ref.getLineItemValue('apply', 'apply', i) +' '+ 
ref.getLineItemValue('apply', 'amount', i) + ' '+
ref.getLineItemValue('apply', 'total', i));
}
console.log(nlapiSubmitRecord(ref, true));

****** Disclaimer: This response was generated by an artificial intelligence assistant based on previous conversations from multiple Slack channels, and may contain inaccuracies or mistakes. ******