If the total of your deductible taxes is over the limit of $40,000 ($20,000 if married filing separately) and you're itemizing deductions, you'll need to use the
Line 11 Worksheet in the
Form 8829 instructions to figure the amount to enter for your home office deduction.
On the
Home Office Only Expenses screen, enter the amount from Step 9 of the worksheet as real estate taxes, and enter the amount from Step 10 of the worksheet as
excess real estate taxes.
To figure the amount to enter in the
Itemized Deductions section, add Step 2 of the worksheet to Step 3 then subtract Step 6.