All W-2's received for tax year 2019 were to be entered on only one 2019 tax return.
You will have to amend your 2019 tax return to add the additional W-2.
See this TurboTax support FAQ for amending a 2019 tax return originally completed and filed using the TurboTax online editions - https://ttlc.intuit.com/community/tax-topics/help/how-do-i-amend-my-2018-turbotax-online-return/01/9...
