@spat001 What? Why did you say you the 5600 was NOT received? You got letters 6475 saying you got it.
The Recovery rebate credit on line 30 is only if you didn't get the full Stimulus payment or qualify for more.
Double check your bank statements and Check your IRS account (both accounts if married)
Your Online Account | Internal Revenue Service
If the IRS thinks they sent it to you but you didn't get it request a trace for a missing third Stimulus payment
https://www.irs.gov/newsroom/questions-and-answers-about-the-third-economic-impact-payment-topic-j-p...
And amending won't fix anything.
