1. Well whether you have made partition of the property by metes and bounds ( physically ) or not does ot make any difference as you are co-sharers of the said said property.
2. in that context it will be false statement on oath if you swear an affidavit stating that you do not any immovable property.
3. On the basis if this fact I can not advise to execute such affidavit as making false statement on oath is a criminal offence.