If you do not have a verification code on your W2, just leave it blank.
For filing season 2018, the Internal Revenue Service has expanded the pilot to verify the authenticity of Form W-2 data. This initiative is one in a series of steps implemented by the Security Summit to combat tax-related identity theft and refund fraud.
The objective is to verify Form W-2 data submitted by taxpayers on e-filed individual tax returns. The IRS has partnered with certain payroll service providers (PSPs) to include a 16-character verification code on many Forms W-2 provided to employees.
W 2 Verification Code | Internal Revenue Service
Because of new wage and income reporting requirements, the IRS announced it would discontinue the Form W-2 Verification Code pilot for the 2019 tax year.
Federal law now requires employers to submit Forms W-2 by January 31 each year, which helps the IRS combat fraud and identity theft and superseded the need for a verification code.