Never received 2020 Federal return check. How can I resolve this? I filed through TurboTax, can I do anything through them or do I need to reach out to the IRS directly?

You have to reach out to the IRS. The IRS doesn't share any information with us once they have your return.

Here are some possibilities: 

1. The IRS found a discrepancy in your return

The IRS reviews the information you entered in your return and compares it with what they have in their database. If there are any discrepancies, they make adjustments accordingly and send your reduced refund.

Some common errors found are incorrect advance Child Tax Credit or stimulus payments amounts, which can cause significant reductions in your expected refund.

The IRS will send you a letter explaining the adjustment, but it usually takes about three weeks to arrive. If you got your refund already, check the IRS Where’s my refund? site to see what they adjusted and how it impacted your refund. It may take several days for the site to be updated.

2. The IRS offset your refund

A refund offset is when the IRS applies part of, or all, your refund toward past-due income tax, child or spousal support, student loans, or state unemployment compensation debts. If this happens, check the IRS Where's My Refund? site for more information. You’ll also get a letter explaining why you didn't get your entire refund.