Help me to write the following expression

[suvechha_b]

How to write in expression :

if([Fiscal Year] is not selected and [Fiscal Month] is not selected)

[Fiscal Year], [Fiscal Month] are filters.

eg,

=if ([Fiscal Year]=' ' and [Fiscal Month] =' ',

Sum({<[period_key]={$(vMaxPeriod)},[Fiscal Year],[Fiscal Month]=>}inventory_on_hand-qa_blocked_stock),

Sum({<[period_key]={$(vMon)}inventory_on_hand-qa_blocked_stock))

[ali_hijazi]

to know if a field has selections or not use GetSelectedCount(Field)

[Gysbert_Wassenaar · Accepted solution]

if(not getselectedcount([Fiscal Year]) and not getselectedcount([Fiscal Month]), ...true..., ...false... )