Deductions & credits

The executor provided us 1/3 of the amount on the 1099R.  The 1099R is addressed to the Deceased and the Exec.  There was only one 1099R with the full amount shown.  I paid estimated taxes on the 1/3 that I received but can not put the entire amount from the 1099R on my tax return.  The estimated taxes were paid by each individual.  (1/3 each).  The 401K plan would only make a single disbursement for the full amount.  There was not a trust nor will.