How to change the Year in a form when the previous month column is the first period of the year?

Hi all,

In our application we created some Forms in which we have 2 columns, in one column you see the period selected in the pov and in the second the Relative(&Period,-1)

when you select the first period of the fiscal year (in our case September) you correctly see in the second column August but for the same year in both the columns.

There is a way to have in the second column the year change when current month is September -> Previous month is August but also previous year.

Thanks