It will not matter where you got the money from for the investment property. How you treat expenseds depends on the type of investment property it is. For example:
If it is a rental property you will be able to take mortage interes, taxes, insurance, depreciation and other expenses related to the management of the rental unit using schedule E.
My answer assumes that this is a situation where you withdrew IRA funds to pay for the realestate. IF the fund bought the property and the property is owned by the Fund, the fund takes any deductions and expenses and you do not.