Last year dynamic sales

Giada_Togliatti , Better to move this to date of year table as you need all

value previous year = VAR ANNO= (SELECTEDVALUE(Orders[Order Date].[Year]))
RETURN
CALCULATE(SUM(Orders[Sales]),all('Orders'),
Orders[Order Date].[Year]=ANNO -1)

value previous year =
VAR ANNO= maxx(allselected(Date),Date[[Year])
RETURN
CALCULATE(SUM(Orders[Sales]),all(Date),
Date[Year]=ANNO -1)

Or try something like (Example) //You can use year table in place of Date table

This Year = CALCULATE(sum('order'[Qty]),filter(ALL('Date'),'Date'[Year]=max('Date'[Year])))
Last Year = CALCULATE(sum('order'[Qty]),filter(ALL('Date'),'Date'[Year]=max('Date'[Year])-1))

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 :
https://radacad.com/creating-calendar-table-in-power-bi-using-dax-functions
https://www.archerpoint.com/blog/Posts/creating-date-table-power-bi
https://www.sqlbi.com/articles/creating-a-simple-date-table-in-dax/

Discussed same in webinar : https://community.powerbi.com/t5/Webinars-and-Video-Gallery/PowerBI-Time-Intelligence-Calendar-WTD-YTD-LYTD-Week-Over-Week/m-p/1051626#M184