After you file


@wilkolman wrote:

I forgot to enclude some income for 2018 not sure what is next


You must amend the 2018 tax return to add the income.

 

See this TurboTax support FAQ for amending a 2018 tax return - https://ttlc.intuit.com/community/amending/help/how-do-i-amend-a-return-in-turbotax/01/27579