Builder ke tax benefit claims par trust karein kya?

Tax benefits jo builder ne bataye the, sab misleading lag rahe hain ab. I just got possession of my 3BHK on Kalawad Road, Balaji Group se liya tha. They showed ki Section 24 mein itna deduction milega, but loan documentation aur completion certificate mein kuch issues hain. Mera CA bol raha hai poora claim nahi kar paunga. Matlab, jo ROI calculate kiya tha, woh toh gaya. Kisi aur ne yeh issue face kiya hai Rajkot mein? Kaise sort kiya?