This addendum is to be used when the property is subject to one or more residential leases. 51-1 Redline 11.2022.The addendum is a formal document that contains the newly agreed-upon terms while retaining the rest of the original lease agreement in full force. TAA Click and Lease allows you to quickly fill out and print all of the official TAA Lease Forms and REDBOOK forms. In an addendum to a lease, you will need to add the dates, names and addresses of all parties involved in the original lease agreement. Sign it, have the manager sign it, and keep a copy. This will be helpful if there is a dispute over deductions for repairs when you move out. In the middle of the agreement: Tenants might be able to decline to sign it if it is an addendum to a current lease. Fill Out the Date: Write the specific date when the addendum is created. To fill out this Tenant Addition Addendum, first gather the names of all tenants involved.