For the second computer - you will have to copy the tax data file from the first computer, it has a file extension of .tax2020 for the 2020 tax return. It is stored by default in the Documents directory in the TurboTax folder. Then install the tax data file on the second computer.
Start the TurboTax 2020 program on the second computer. Click on the File menu at the top left of the desktop program screen. Click on Open Tax Return. Browse to where you installed the tax data file.
