I DID NOT RECEIVE EITHER 2020 STIMULUS CHECKS, 600 OR 1,200. IT IS NOT ASKING THE QUESTION, IF I HAVE RECEIVED THEM OR NOT.

what is on Line 30 for Form 1040? is $1800 already there? 

If you did not get prompted to enter your stimulus information, that means you either:

• filed as a dependent being claimed on another tax return, or 
• have an AGI too high to claim the recovery rebate

To get to the stimulus questions in TurboTax at any time, you can search for stimulus and use the Jump to link.  Generally, if you have adjusted gross income up to $75,000 for individuals and up to $150,000 for married couples filing joint returns and surviving spouses, you will receive the full amount of the recovery rebate.  For filers with income above those amounts, the payment amount is reduced. 

After you have entered your tax information and are ready for the Federal Review, it will be the first question.

If you are trying to trigger it, you can go to Other Situations, answer any questions and click Done. The next automatic selection is Federal Review and it will ask about payments received.

If you didn't get one or both of the Stimulus payments or qualify for more it will be the Recovery rebate credit on 1040 line 30.  It either adds to your refund or reduced a tax due.

How do I look at the form before I file?

And no it's not popping up during the review

It's not popping up during the review

until you pay for the service, you can't look at the tax return is my understanding.

if you didn't receive any stimulus, there is nothing to enter; it should just appear on Line 30,