There is a continuing and as-of-yet unsolved issue with the online version of the program importing from the prior year's .tax20019 file. Also, you *must* use the same exact account you used to file the 2019 tax return with, when starting your 2020 tax return.
If you are using the same account, your options are to either clear the return and start over from scratch so you can execute the import again, and then confirm the data was imported. Or you can manually enter last year's data into the 2020 tax return fromthe two 4562's for the assets from the 2019 tax return.