The U.S. IRS has issued guidelines on ways to prevent typical errors in federal tax returns. --- Avoid tax return mistakes, reduce processing delays, and refund adjustments by following these guidelines WASHINGTON — As the April 15 filing deadline approaches, the Internal Revenue Service issued a reminder to taxpayers on ways to prevent typical errors on their federal tax returns to help speed potential refunds. Collect all tax-related paperwork Taxpayers should collect all key documents, including Forms W-2 and 1099, as well as any supporting paperwork for tax deductions or credits such as educational credits or mortgage interest payments. Additionally,...