What does the Irs mean by they are processing my return

You have to keep waiting.   You are not alone. Millions are still waiting. Turbo Tax only gives you an estimated date. The IRS usually pays most refunds within 21 days. But these are not normal times. This year is taking the IRS longer to send the refunds. There are millions more people filing returns to get the Stimulus payment.

See this news article on Refunds being delayed
https://www.msn.com/en-us/money/personalfinance/where-is-my-damn-irs-tax-refund-new-answers-emerge-as-delays-frustrate-millions/ar-BB1g54Ks?ocid=BingNewsSearch

Only the IRS can tell you. If your return was Accepted then check IRS Where's my refund
https://www.irs.gov/refunds/

When will you get your refund?
https://ttlc.intuit.com/community/refund-status/help/when-will-i-get-my-irs-tax-refund/01/25589

IRS - Questions about Refunds
https://www.irs.gov/refunds/tax-season-refund-frequently-asked-questions

Did you efile?  Was it Accepted?

Did you go all the way through the File tab, through the 3 steps and hit the big orange Transmit Returns Now button?

If you used the Online version you can check your efile status here     

https://turbotax.intuit.com/tax-tools/efile-status-lookup/   

When you efile you get back 2 emails.  The first email only confirms the transmission.  The second email says if the IRS (or state) Accepted or Rejected your efile.

When you log into your account you should also see the status and if it was Accepted or Rejected, Started, Printed, Ready to Mail, etc.  What does it say?

@bnoakes2 "Processing" means the IRS has your tax return and they are working on it.   "Accepted" only meant that you entered enough data to get it into the system.   The IRS then has to see what you entered---if they approve of the data you entered then they will issue your refund.  Only the IRS controls when the refund will be issued.

https://ttlc.intuit.com/questions/2840013-does-accepted-mean-my-refund-is-approved