I want to modify the 24g books amount

TDS return can be revised:-

1 Request for conso file on TDS portal

2 Download it from TDS portal 

3 Add/ Modify entry

4 Submit RPU file.

24Q - RPU file - there is no provision to modify the challan amount unless it is unmatched.

My challan is matched with the return. But now I want to add more deductees in the 24Q. How is it possible ?

If challan is matching and more entries are to be entered in same challan it can be done through conso file.

If new challan with new entries are to be entered it can also be done through conso file.