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These common missteps in preparing your IRS returns could cost you thousands in penalties, missed deductions, or audits. Learn how to avoid them.

Advertising Disclosure: When you buy something by clicking links within this article, we may earn a small commission, but it never affects the products or services we recommend. Tax season can be stressful, but making the wrong moves could drain your wallet. Simple filing mistakes, overlooked deductions, or incorrect reporting can lead to hefty penalties or missed refunds.