100
Any tax or return information, declaration of estimated tax, or claim for refund. Including the tax payer’s identity, the nature, source or amount of income, payments, receipts, deduction, exemptions, credits, assets, liabilities, net worth, tax liability, tax withheld, deficiencies, over-assessments, or tax payments, or any other data with respect to a return or with respect to the determination of the existence or possible existence of liability for any tax, penalty, interest, fine or forfeiture.
What is FTI