_setDiscountTax
Sets the Tax value in an Invoice
Parameters
id
The ID of the Invoice being modified
val
The amount of Tax set for the Invoice, 1 is considered a euro (e.g 2.49 => €2.49)
Example
FM_api('Invoice_setDiscountTax',[
'id'=>'697943',
'val'=>'2'
]);
Result
On Success
{"ok":1}
On Failure
If the "id" parameter is missing or has a value less than 1:
{"error":"missing or invalid parameter: id"}
If the "val" parameter is missing:
{"error":"missing or invalid parameter: val"}
If the Invoice being modified has its Status set as Paid:
{"error":"cannot edit invoices that are marked Paid"}
If the "val" parameter value contains non-numeric characters (e.g a-z):
{"error":"invalid discount tax"}
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