After you file

You will have to file a 2019 amended tax return, Form 1040-X, filing jointly and enter all of the income and deductions for the both of you.

 

See this TurboTax support FAQ for amending a 2019 tax return - https://ttlc.intuit.com/turbotax-support/en-us/help-article/amend-tax-return/amend-2019-return/L3oo8...