If a new field card has not yet been issued for a new construction/ tear down & rebuilt/ newly subdivided property, you should use 999999999 (nine 9s) as the Parcel ID. You are responsible for entering the correct Mil Rate and Tax Year, but there will be no Tax Amount or Assessment yet, so it is permissible to enter 0 (zero) in the Tax Amount and Assessment Amount fields.
The taxes and assessment will appear on the listing as TBD (To Be Determined).
For new construction and to-be-built homes, the year built should be the year the foundation will be installed.
For tear down & rebuild properties, unless the foundation is removed, the year built will not change.