What is optional deduction?

Is selling on eBay considered self employment income? What is PATMI? Why is the distinction between current and non current assets important when preparing financial statements? Do you have to pay taxes on benefits from a life insurance policy in CT? How many checking accounts are there in the US? What is the effect of a decrease in accounts receivable in the cash flows? What does the vendor of an ATM machine get out of having an ATM machine? How would you explain the accounting process to someone who does not know anything about it? How many percentage allowed in provision for bad debts? Accounting classifications are codes used to? Types of real assets? Is there a term for putting inventory once obsoleted back on the books? How can you accumulate American Express Rewards? Does net mean with or without vat? How much duty do you pay if you go over allowed amount? What kind of tax is the federal government's tax? What are the disadvantages of a passbook savings account? How much postage for a w2 form? How much is sales tax in down town Chicago? What the meaning of doubtful?