Deducting Tax prep fees for trust

We did not know that we were supposed to file taxes for a trust for 5 years (elderly parent had H&R Block do personal taxes & was never told about it).  We hired a tax professional last year to file all the back returns & appeal to the IRS.  Can all those fees be deducted from this year's return for the trust?  Or, just the fees to file the 2015 return?
Thanks!