Most schools will not update the cost of attendance for the 2019-2020 academic year until about May or June…or after. Costs for tuition, fees, room and board have the potential to increase.
The best you can do is look at the current cost of attendance adding about 3% because that seems to be the average increase in costs per year, and subtract the aid your kid has received. The remaining amount will be billed to you.
Then you need to add in personal expenses and books.
If the schools your student is accepted to guarantee to meet full need for all, and their costs increase, your aid probably will too.
BUT if your student is accepted to schools that do not guarantee to meet full need for all, your aid might not be adjusted at all if the costs to attend increase.