Does this work?

[Last Year to Date]

if year([Date])+1 = year({fixed : max([Date])} )

and  [Date] <= dateadd('year',-1,today()) then [Net Sales] end

Thanks,

Shin

This calculation should help you.

if DAY([Invoice Date])<=DAY(TODAY()) and MONTH([Invoice Date])=MONTH(TODAY()) and YEAR([Invoice Date])=YEAR(TODAY())-1

then [Net Sales]

END

I have assumed your data set is on daily basis and that you are looking at Jul until 6th of last year.

Tweak it a bit to match your needs otherwise

Then create a reference line with this field with per pane scope.