In many cases the IRS will reject a 2019 E-filed tax return if one of the taxpayers on the tax return is deceased.
Your only option is to print and mail the tax return.
See this TurboTax support FAQ for printing a tax return for mailing - https://ttlc.intuit.com/community/printing/help/how-do-i-print-and-mail-my-return-in-turbotax-online...
