Only the IRS controls when and if a stimulus payment is distributed.

Go to this IRS get my payment website - https://www.irs.gov/coronavirus/get-my-payment

If you do not receive any other stimulus payments by January 15, 2021, then the stimulus payment for which you are eligible to receive will be entered on your 2020 federal tax return as a tax credit on Form 1040 Line 30.

The TurboTax program will ask about stimulus payments in the Federal Review section of the program.

I am seeing a number of posts like this.

1) The IRS must stop sending payments on Jan 15

2) the IRS won't begin accepting returns until Jan 27

3) if the payment doesn't arrive, it will be reconciled on your 2020 tax return.. Just fill in the requested amounts in the Federal Review Section and then look on Line 30 of Form 1040 where the credit will appear.  It has the affect of increasing your refund (or reducing what you owe)

Suggest waiting until Jan 27, at the earliest, to file to give the mail time to clear.  That will minimize your headache if you file prior to the 27th and the check arrives a day later, which we all know is Murphy's Law and likely to occur! 

Why just half though? I know the payments are only 600 per person this time, but with my wife myself and my 3 dependents I only received $1,500