Field help (TAXBASTPF) 

This field is used to select the rule determining the value for the professional or property tax basis that will be retained for the assets at the target company.
This rule is applied only to the assets meeting both the following criteria at the same time:
1/ Their holding type is In property.
2/ Their purchase date is inferior or equal to the date precised in the following field: For the assets acquired until.
For the other assets, their tax basis will be systematically equal to the contirbution value.