Probably not. I am guessing when you talk about trust and 1/2 the house, you both had grantor trusts with 1/2 of your joint assets in each. All income and expenses from a grantor trust are reported on your individual tax returns. Normally that would flow to the miscellaneous itemized deduction line of the Sch A. However, miscellaneous itemized deductions are no longer a deduction on the schedule so you would not be able to deduction those expenses on your Federal tax return. You would be able to add them to the cost basis of the house, which would lower any gain realized at sale.
Now if you live in state that still allows itemized deductions and did not couple with the 2018 tax law changes, you may be able to take the deduction if you itemize deductions for your state return and include the legal costs as an itemized deduction.
Additionally, if the trust is not a grantor trust, you could be reimbursed for those cost from the trust and the trust could deduct those costs as legal expense on the trust 1041 tax return.
