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Error Message 177: INVALID_LAST_NAME

You'll see the following error message in H&R Block’s 2016 tax software if you have entered your last name into the tax software prefaced by a non-alphanumeric character:

The last name you entered doesn’t seem to be valid. Please ensure you entered it correctly. [error code: 177]

How do I fix this?

To correct the error, enter your last name correctly in the designated field of the Your personal information page in the tax software.

Examples of non-alphanumeric characters that will trigger this error include: [ and ]

For example:

Correct: Smith
Incorrect: [Smith