Multiple fact tables

Modify your Date Table formula to extend the range-

DateTable = CALENDAR(DATE(2023, 1, 1), DATE(2024, 12, 31))

Define your YTD Sales measure as follows:

YTD Sales = 
CALCULATE(
SUM(SalesTable[Value]),
DATESYTD(
'DateTable'[Date], 
"12/31"
),
SalesTable[Created Date] <= TODAY() // This ensures only sales up to today are included
)

Create a Monthly Budget measure:

Monthly Budget = 
CALCULATE(
SUM(BudgetTable[Budget Value]),
USERELATIONSHIP('DateTable'[Date], BudgetTable[Date]), // Activate the inactive relationship
BudgetTable[Sales Category] = SalesTable[Sales Category]
)

PYTD Sales measure-

PYTD Sales = 
CALCULATE(
SUM(SalesTable[Value]),
SAMEPERIODLASTYEAR(
DATESYTD(
'DateTable'[Date], 
"12/31"
)
),
SalesTable[Created Date] <= EDATE(TODAY(), -12) // Restrict PYTD sales to the same period as current year
)