set expression with date

[TomBond77]

Hi experts

Need your help. I have this formula but having an error in expression. Can you please help?

sum(

{<[YearMonth] >= date(MonthStart("2023-Jul"), 'YYYY-MMM')>}

Amount)

[TomBond77]

already solved:

sum(

{<[YearMonth] = {"$(='>=' & Monthstart('01.07.2023') )"}

Amount)

But now I need to add more logic: YearMonth is a filter dimension. I we select '2023-Jun' the formula should NOT show any value!

Can you help?