I accidentally did not file my son as my dependent

[brianna_arnold3]

How can I fix I filed my son as not a dependent

[DoninGA]

Since you have filed your tax return you will have to amend the tax return to add him as a dependent.

Before starting to amend the tax return, wait for the tax refund to be received or the taxes due to be paid and processed by the IRS.

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