QTD

Is qtr is standard calendar . means Apr-Jun, Jul-Sep etc. Better you can use Date calendar and time intelligence

QTD Sales = CALCULATE(SUM(Sales[Sales Amount]),DATESQTD(('Date'[Date])))

Last QTD Sales = CALCULATE(SUM(Sales[Sales Amount]),DATESQTD(dateadd('Date'[Date],-1,QUARTER)))
Last to last QTD Sales = CALCULATE(SUM(Sales[Sales Amount]),DATESQTD(dateadd('Date'[Date],-2,QUARTER)))
Next QTD Sales = CALCULATE(SUM(Sales[Sales Amount]),DATESQTD(dateadd('Date'[Date],1,QUARTER)))

Last year same QTD Sales = CALCULATE(SUM(Sales[Sales Amount]),DATESQTD(dateadd('Date'[Date],-1,Year)))

trailing QTR = CALCULATE(SUM(Sales[Sales Amount]),dateadd('Date'[Date],-1,QUARTER))

If not, Have calendar table when you have Qtr and create a rank on qtr and use the rank . Refer this week example of Using rank

https://www.dropbox.com/s/d9898a48e76wmvl/sales_analytics_weekWise.pbix?dl=0

Also, vote for Idea of non-standard Qtr

https://ideas.powerbi.com/forums/265200-power-bi-ideas/suggestions/39772834-custom-period