How do you sign your tax return when e-file using online filing software

Good Question, here is your answer;

You sign your tax return using the Self-Select PIN method.

The Self-Select PIN method allows taxpayers to electronically sign their individual income tax return by selecting a five-digit personal identification number (PIN).

The PIN is any five numbers (except all zeros) that you choose to enter as your electronic signature.

If you are filing a joint return, each taxpayer needs his or her own PIN. As part of the authentication process, each taxpayer also enters his or her date of birth and either his or her original prior year adjusted gross income (AGI) or prior year PIN.

If you need to know the eligibility requirements or you cannot locate your prior year AGI or prior year PIN, see Self-Select PIN Method for e-file for additional information.

How do you sign your tax return when e-file using online filing software, Answer Here, Former IRS Agents