I received an offer outside TCS, but TCS is asking me about my expectations from TCS if the company retains me. What should I do?

Tell your expectations, 99% they can't meet the same so you have option. If they can meet your expectations then stay some time after that again resign it.

Have you already resigned?

Which company offer?

So you are setting "questions" as answer.

No bro.. You have too IQ to go anywhere

Switch.

Ask them to give work from home permanently

Tell your expectations and move to outside