Yes, you can continue to use the joint 2019 account in TurboTax.
There's no reason to change the name order on a joint return filed with a deceased spouse. When you enter or review his or her info, just make sure you check Passed away before filing this return and enter the date of passing.
Changing the name order may cause delays in processing your tax return.
For further information please see this TurboTax link: Should I change the name order on a joint return with a deceased spouse?
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