Please verify that you have entered the information correctly in the Recovery Rebate section:
For additional information please see Stimulus FAQ at the end of the TurboTax article.
Look at Form 1040 to check line 24 total tax and line 33 total payments to see how your refund is calculated.
You might owe some tax on your income. Check 1040 line 30 for the Recovery rebate credit. It either adds to your refund or reduced a tax due. Before filing, You can preview the 1040 or print the whole return