Hello, we have added the IRS IRIS code to Omnipay and successfully created a XML file. We logged into the IRS website and created credentials. Now, we are trying to send files as a test. What methods are other companies using to transmit the file to IRS? We are trying Postman and running into errors. Any other easy options? Trying to avoid massive development effort to submit files once a year. Thanks.

Mike Nebel – NRECA