I believe you get money back from tax credits. But tax rebates only occur when you deduct expenses from current income and rebate money you've already overpaid

I believe you get money back from tax credits. But tax rebates only occur when you deduct expenses from current income and rebate money you've already overpaid in as taxes, which, if you have no current income you would not have paid in these tax amounts, and means expense amounts go in a "savings account for expenses" to use whenever in the future you have income. (that's a little too complicated but at a certain point I had to quit) I think you're talking about tax credits.