Technically speaking, when your tax return is e-filed, TurboTax creates an XML file that is uploaded to a data warehouse. The IRS downloads that XML file and imports it into their system for processing. TurboTax cannot include anything that is not already approved in the IRS‘s XML specifications, or the return will automatically be rejected. No tax preparer can change the specifications of the XML file, no matter how good an idea it might be. Only the IRS can do that.
