If I want to claim prior years' w2 forms that never got filed previously, can I add to this year's return? I didn't file in previous tax years due to the low gross income requirements met, although with 2 dependents could this benefit me?
No, you cannot enter a prior year W-2 on the 2018 tax return. Only W-2's for 2018 can be entered on a 2018 tax return.
The prior year W-2 has to be entered on tax return for the year of the W-2.
Forms: <a rel="nofollow" target="_blank" href="https://www.irs.gov/forms-pubs/prior-year">https://www.irs.gov/forms-pubs/prior-year</a>