Education cess in tds

Deposit the difference amount through challan & revised TDS Return accordingly.

Yes, You can revise through RPU.

No, You have to just add challan details in RPU (Correction)

When you will revised the Return you have to put or cross check previous challan details in that return as well as update new challan details also as addition for difference amount.

Sure, My number is +91 9955369975 It is published on my profile also.