Did you already pay? If you haven't already paid, you can purchase the desktop software (CD/download) and install it. Then you can download the *.tax2018 data file you started online and finish the return in the desktop software. If you already paid for the online product, however, then that won't help. Plus, you might end up paying more in the desktop product. See my Note in the next paragraph.
NOTE: However, if you have a state return, then be aware there is a 19.99 state efile fee in the desktop version to consider as well (except free efile for New York state.) So that might make the desktop product more expensive than your online product. Your fee in the desktop product would then be 69.99 + 19.99 = 89.98. So you are better off in the Online version with a state return that you want to efile. In the desktop product, there is no fee, however, to print and mail a state return, so that would avoid the 19.99 fee.
