Time Difference sales data

subho220 , Do not use .Date. Mark Date table as date table 

QQC Prev Month = CALCULATE(SUM('ICS_[Warehouse_Balance_Final]'[QuantityinQualityControl]),PREVIOUSMONTH(Dim_date[Date]))

or

QQC Prev Month = CALCULATE(SUM('ICS_[Warehouse_Balance_Final]'[QuantityinQualityControl]),datesmtd(dateadd(Dim_date[Date],-1,month) ))

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

Calculation Groups- Measure Slicer, Measure Header Grouping, Measure to dimension conversion. Complex Table display : https://youtu.be/qMNv67P8Go0

Why Time Intelligence Fails - Powerbi 5 Savior Steps for TI :https://youtu.be/OBf0rjpp5Hw
https://amitchandak.medium.com/power-bi-5-key-points-to-make-time-intelligence-successful-bd52912a5bd4
To get the best of the time intelligence function. Make sure you have a date calendar and it has been marked as the date in model view. Also, join it with the date column of your fact/s. Refer :radacad sqlbi My Video Series Appreciate your Kudos.