while I appreciate this whole problem with the payments is a mess, if you do not receive the payment by late January, you will receive what you are due as part of the 2020 tax return filing.
Look for the stimulus payment questions in the 'federal review' section of your 2020 tax return filing in TT and then the amount you are due will be listed on Line 30 of Form 1040. It will increase your refund (or reduce what you owe)
does that help?