TDS and ITR

Hello all, I had a quick question on TDS and ITR declaration. Normally I get the form 16 from my office and upload the same to cleartax or some portal that helps with ITR filing. Now if there was something I missed to add or can file in ITR for refunds I do it there.

Recently I had someone tell me that they get refund after declaring TDS in ITR and gets a refund of it. Saw something similar in a post in the India sub.

Can someone help me understand what is the process to follow? My understanding was that TDS is my income tax and whatever I can claim as benefits I can do that when filing an ITR.