Unfortunately you have to submit the whole return in print by mail. This is a shame as it obviously introduced more worry and waiting into the process (and printing and postage). Last year it took many months for my printed return to be processed and to receive the refund due. It's ironic that TTax talks about helping us speedy refunds, but their failure to include the 5471 forms (which some other tax software providers do include) is creating a lot of delay and extra work for its customers. Sorry to be bearer of bad news on this, maybe someday TTax will fix their software to catch up with the market.
