Current Year and Last Year report

We would like to create a BAQ Report to show invoice totals for this year and last year.

We would like to prompt the user with a single “As Of Date” using a parameter and then use the parameter date to calculate back one year.

I do not see where I can use a Parameter in a Formula.

Is there some trick to this?

Thanks - DaveO

@DaveOlender

This might help

Mr. Prashanth: That is excellent - Thank you so much.

DaveO