Per IRS Instructions for Schedule A Itemized Deductions, on page A-13, the IRS is VERY specific as to the items that can be listed on Line 16 of Federal Schedule A:
Other Itemized Deductions
List the type and amount of each expense from the following list next to line 16 and enter the total of these expenses on line 16. If you are filing a paper return and you can't fit all your expenses on the dotted lines next to line 16, attach a statement instead showing the type and amount of each expense.
CAUTION! Only the expenses listed next can be deducted on line 16. For more information about each of these expenses, see Pub. 529.
As the IRS doesn't want anything else entered on Line 16 of Schedule A, the TaxAct® program limits the entries allowed to be made in the program to those items outlined by the IRS.
To enter other itemized deductions in TaxAct (that is one of the items listed above allowed by the IRS on Line 16 of Schedule A if you itemize deductions):
Note that any link in the information above is updated each year automatically and will take you to the most recent version of the document at the time it is accessed.