Qualified for 3rd stimulus, followed all prompts, but can find no trace of it in my federal return. Is it a separate deposit entirely, or should I be seeing it included?

If you are getting the 3rd EIP payment as a recovery rebate credit it is on line 30 of your Form 1040 and is added to your refund or can reduce your tax owed.  You do not receive it as a separate payment.

PREVIEW 1040

https://ttlc.intuit.com/questions/1901539-how-do-i-preview-my-turbotax-online-return-before-filing

Click on Tax Tools on the left side of the screen. Click on Tools. Click on View Tax Summary. Click on Preview my 1040 on the left side of the screen.

If you qualified for the Recovery Rebate Credit, it would be on Line 30 of your return. It is not a separate deposit. It either increases your refund or decreases your tax due.

Generally, you are eligible for the full amount of the third Economic Impact Payment (or the Recovery Rebate Credit) if you:

• are a U.S. citizen or U.S. resident alien (and their spouse if filing a joint return), and
• are not a dependent of another taxpayer, and
• had adjusted gross income (AGI) that is not more than:
  • $150,000 if married and filing a joint return or if filing as a qualifying widow or widower
  • $112,500 if filing as head of household or
  • $75,000 for any other filing status

Payments are phased out – or reduced – above those AGI amounts. This means people do not qualify if their AGI was at least:

• $160,000 if married and filing a joint return or if filing as a qualifying widow or widower
• $120,000 if filing as head of household
• $80,000 for any other filing status