Problem with Running Totals for Prior Year

angelo2022 , Try like example

Last YTD Sales = CALCULATE(SUM(Sales[Sales Amount]),DATESYTD(dateadd('Date'[Date],-1,Year),"6/30"))

or

new column

Day of Year =datediff([Year Start date] , [Date],Day) +1

measures

YTD= CALCULATE(sum('Table'[Qty]), FILTER(ALL('Date'),'Date'[Year Rank]=max('Date'[Year Rank]) && 'Date'[Day of Year] <= Max('Date'[Day of Year]) ))
LYTD = CALCULATE(sum('Table'[Qty]), FILTER(ALL('Date'),'Date'[Year Rank]=max('Date'[Year Rank])-1 && 'Date'[Day of Year] <= Max('Date'[Day of Year])))

Time Intelligence, DATESMTD, DATESQTD, DATESYTD, Week On Week, Week Till Date, Custom Period on Period,
Custom Period till date: https://youtu.be/aU2aKbnHuWs&t=145s