1. You need to deduct tds @31.2% (tax plus cess) on the rent unless your landlord gives you no/low tds deduction certificate
2. Yes, you need TAN
3. Yes
4. Yes, 15CA is required irrespective of the amt and 15Cb Is required if the rent exceeds 5 lacs. Yes, we can issue 15CB. Pls connect us over phone as we are not allowed to give our contact details