YTD vs LYTD in analytics

Im trying to create a customised variance report. The report lines with our customer’s financial year that runs April to March and shows individual product volumes . I’ve set up a customised date that run April 2025 to March 2026. The YTD adds up correctly, however when i do the LYTD its adding up the total from April 2024 to March 2025. Is there a way this can be LYTD rather than the total qty of the 12 month period?