Source: U.S. Department of the Treasury. Internal Revenue Service
Release: SOI Tax Stats - Historical Data Tables
Deductions for mortgage real estate loan interest were limited. Personal interest was not deductible.
For additional information about the return filing requirements, see the annual reports, Statistics of Income-Individual Income Tax Returns at https://www.irs.gov/uac/soi-tax-stats-historical-data-tables.
U.S. Department of the Treasury. Internal Revenue Service, Individual Income Tax Filing: Itemized Deductions: Interest Paid [IMZDIPA], retrieved from FRED, Federal Reserve Bank of St. Louis; https://fred.stlouisfed.org/series/IMZDIPA, April 1, 2023.