Your daughter that was born February 20 did not qualify for the first stimulus check. She did qualify for the second check. When you entered her on your tax return, her social security number must have been correct and she needed to meet all of the conditions and all of the questions needed to answered correctly. Go through your return taking careful note of the examples that Critter-3 just posted.
Since you have already filed your taxes, you can only make changes to them if they are rejected when the IRS starts accepting returns on February 12. If they are accepted, then wait until the processing is complete and then use TurboTax to file an amend so that your stimulus for your daughter is included in your amended return.
