Deductions & credits

Thanks to you and the previous expert who responded. This makes sense. I only questioned the definition of "paid" because estimated taxes paid in advance against whatever the current year's liability may turn out to be are, in the most literal sense possible, "paid" in that current year. As we know, however, the actual liability for that current year is only determined when filing the return in next year. Hence, the issue of refunds and the definition of "paid." If there is an additional payment required, then it is paid when I pay it, obviously. I will account for refunds as you stated, which is the only logical way of looking at it, and make sure that I am not double-dipping. Thanks again. My questions are answered!