If you don't have a schedule O, enter $0. When they ask for original deductions, they are referring to the amount deducted on the original (not amended) tax return.
A schedule O is used to report the amount of deductions for contributions to Medical Savings/Health Savings Accounts, and contributions to 529 plans and
Pennsylvania ABLE Savings Programs.
Schedule O must be included in the amended return if you are changing the deductions. But, you are not changing the deductions from $0, you are amending the income so this is not applicable.
