Just because the legislation has not passed Congress does not mean you have to delay filing your tax return.
Even if the legislation passes sometime this year and signed into law, there is no guarantee it will even apply to tax year 2023.
If it does apply to 2023 it will take the IRS a month or two to change their forms and schedules for tax year 2023 to reflect the changes. Then the IRS will have to write procedures for how to apply for the additional credit, which will also take some time. So probably by the June timeframe something may be available.
