Targeting a PPB rate start date for the first check of the month following the occurred date

Summary:

I've tried several of the delivered rate start date options and not finding one to target the specific check we are after. Does anyone have a suggestion to try or fast formula logic we could try?

Content (please ensure you mask any confidential information):

We are trying to target the pay period begin date for the first check in the following month.

Example, life event occurs 2/19/2026. We want the rate change to take effect for the first check in March. Our first check in March is 3/13/26 for the pay period 2/15/26 to 2/28/26. We want our rate start date to be 2/15/26 so the benefit rate changes this first check in March.