Form W-4 is used by U.S. employees to provide their employer with key information for federal income tax withholding. It helps employers determine how much tax to withhold from each paycheck and ensures proper reporting to the IRS.

Employers should collect a completed Form W-4 from each new hire before issuing their first paycheck. Employees should also submit a new W-4 when they experience a change to their personal or financial situation — such as marriage, divorce, or a shift in income or dependents.

Yes. Avalara 1099 & W-9 enables employers to digitally request, collect, and store W-4 forms in a secure, compliant platform. Digital workflows streamline the onboarding process and help keep payroll records organized and audit-ready.