I never heard of claiming 50% of your groceries bills. Geese I've been doing it the long painful way for years. Hahaha. After every gorcery shop I underline or circle all the daycare foods then at the end of every month I take each receipt and add up all the circled items to have a monthly total....at the end of the year I add up those monthly totals and that's what I claim for yearly groceries. Although I'm lazy every month and usually end up going through all the receipts at the end of the year