Here's how TurboTax and TaxSlayer compare on costs ... Both TurboTax and TaxSlayer offer free and paid versions depending on ...

Promotion: NerdWallet users can save up to an additional 10% on TurboTax. Get started Federal: $37.95 to $67.95. Free version available for simple tax returns only. State: $0 to $44.95 per state.