Additional question re inherited income

[Earl]

If account is held as JTWROS by mother and daughters and mother dies do the daughters pick up date of death market value as basis or does the JTWROS change this. The daughters did not contribute to the account and everything was reported in mother's name prior to her death.

[Gretel]

For estate tax purposes full amount is included in mom's estate since daughter didn't contribute anything.

[John of PA]

yes FMV

My thought on this is: Because the entire amount is taxable for the Federal 706 tax, daughters get the full date of death value as their basis.