Yes, you can re-enter the property with the stepped up basis, if the property was jointly owned. Tenants in common is a different scenario than JTROS. There are a couple ways to do that. See link below for entry.
You will want to make sure you know all prior information before you hit delete. It should be in your original return.
Links to help:
Pub 551 Inherited Property Basis,
How do I edit the basis of rental property in TurboTax to reflect the stepped up basis of the 50% of...
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