What are you doing today?
Example:
Are you polishing the floor?
Yes, I am.
What am I doing?
You're washing the floor.
No, I'm not.
Are you polishing the floor?
Yes, I am.
What are you polishing now?
She's sweeping the floor.
She isn't sweeping the floor.
Is she sweeping the floor?
Yes, she is. / No, she isn't.
What is she doing?
We're cleaning the house today.
We aren't cleaning the house today.
Are you cleaning the house today?
Yes, we are. / No, we aren't.
What are you doing today?