The actor who was in Chennai returned to kochi last night and was grilled by I-T officials at his residence at Panampilly Nagar till 3am.
The actor "cooperated fully with the officials", said the sources.
Huge fan following had gathered at the airport when the actor arrived from Chennai with his wife.
"We have taken some documents pertaining to landed properties. It is too early to comment now. A final picture would emerge by Wednesday," said R Mohan, additional director general, Income Tax.
I-T officials had raided the houses of superstar Mammootty and Mohanlal on Jul 22 after there were reports that the actors were evading tax.
Mohanlal, who is currently shooting in Rameshwaram will be questioned by I-T officials on Jul 25 and in Kochi on Jul 26, said the additional director general.
The raids won't be conducted on Jul 23 (today), said sources.