yes but that is not the real difference?
FOR AGI deductions reduce AGI, the importance of classification is because the AGI is used for establishing limits on certain deductions FROM AGI such...
FOR AGI deductions reduce AGI, the importance of classification is because the AGI is used for establishing limits on certain deductions FROM AGI such as medical expenses, education expenses, property taxes, charitable contributions, and interest found in the itemized deductions. Generally, deductions FOR AGI are related to business expenses while, deductions FROM AGI are personal in nature.
Define AGI. FROM probably increases it and FOR is subtracted. AGI is what’s left.