Custom filter for Today and on

Custom filter for Today and on

Sorry if this has been asked multiple times before but i'm having trouble finding it.

I'm trying to make a custom filter that pulls from a certain field that has a date of today and forward.
I'm thinking but don't know how to do a value of today but something like.

Field Name: Field your working with
Comparison: Greater than or equal to
Value: Current date (have rerport have automatically fill in the day your looking at the report)

Thanks