How do we handle the spinoff and renaming of DowDupont into Dow and Corteva and subsequent renaming

I had purchased Dow over a long period with Divreinvestment. I made the change for the spinoff of Dow from the merger of Dow/duPont(Dwdp) and Quicken changed all the cost basis. Now I have to add the spinoff to corteva and the name change of DWPD back to Dupont(DD). How do I handle the cost basis of both CTVA and DD?


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