TurboTax is the market-leading personal tax filing software, holding the largest share of the US consumer tax preparation market. Owned by Intuit, TurboTax guides users through their return via a conversational, question-and-answer interface that translates complex tax concepts into plain English. The platform imports W-2s, 1099s, and prior-year returns automatically when users grant access, dramatically reducing manual data entry. Its SmartLook feature connects filers with live CPAs or enrolled agents for on-screen assistance at a premium. TurboTax handles a broad range of tax situations — from simple W-2 filers to complex scenarios involving rental income, stock sales, cryptocurrency transactions, business income, and foreign assets. The Audit Defense add-on provides professional representation if the IRS audits the return. The software's accuracy guarantees cover both calculation errors and maximum refund claims. TurboTax's primary criticism is its pricing model — the free edition covers very basic returns only, and many users are surprised mid-filing when their situation requires an upgrade. The company has faced criticism and regulatory scrutiny over marketing of its free tier. Despite this, TurboTax's polished UX, extensive help resources, and reliable accuracy make it the safe default choice for most filers willing to pay for confidence.