How to load prior applied historical absences as a single value using HDL

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We have a new site going live and these people have absences applied history in legacy application. Now we are going to load initial balances for these people using HDL but the problem is we don't want to load any historical applied absences into HCM due to time constraints. Now the problem is the sick plan follows the calendar year ..hence now if we want to use any validation formula for check for applied during a year is not more than 40 hours goes for toss since we don't have any historical absences. 

Is there any way we can update prior consumed absence into HCM so that fast formula understands absence data.