I’m trying to reserve a date it’ll be my husbdan my daughter which is 20 months old & myself. Do I need to include her as well since she’s free?

Yes, she still needs to be included because she is going to take up a space

We ate there yesterday(food is a little better)...they actually count her in the reservation so my answer would be yes...Either way the people at the counter are super accommodating so you will be fine either way

It's good to mention it so that they sit you at a big enough table. But they will not charge you for her seat.

But do I have to include her in the reservation ?

Yes, under 3 is free.