irs.gov/verifyreturn

 Tax filing is completed by getting the return verified through IRS. You can verify your account on 'irs.gov/verifyreturn'. Putting in your information, uploading required documents and answering  the questions will do it for you. Prior to return verification get your identity verified on the portal. Identity and Tax Return Verification Service is provided to prevent your refund from being stolen by some other person. This protects your account.

What you required to verify return?

For completing tax return filing, verfication is most essential step. This requires you to create an account on the irs.gov/verifyreturn prior to  it-

 How to verify your identity with IRS?

 With your ID.me account, you are allowed to verify identity through- Self-Service, Video call or In-person.