This is the mobile app of the Cassa Edile di Siena.It is possible to register with the tax code and view your data managed by the Construction Fund (personal data, monthly reports, hours, GNF, APE, pension, welfare benefits, settlements, withholding taxes, news and more).It is also possible to download the Single Certification (CU) model issued by the Construction Fund and send it to your CAF / Consultant for the tax declaration.To register, you must have your own tax code and have previously communicated your mobile number to the Cassa Edile di Siena.