In the previous e-filing regime, the CA would separately upload 15CB. In the new e-filing regime, it is an integrated workflow. Taxpayer files 15CA and assigns to CA. The CA will then see in his worklist as 15CB pending with prefilled data. CA will fill 15CB and submit back to taxpayer. The taxpayer will then accept the 15CB, as prepared by the CA, in his worklist and download the same.