The email that was sent did NOT say you MUST amend ... however it use the word "may" need to amend "if" certain things applied. If you choose to amend when it was not required then there is nothing you can do but wait for the IRS to process the return. TT cannot help or speed things up for you.
And for the advance of the CTC that just started being sent out if you don't get all you are entitiled to in advance then you will get it on the 2021 tax return. https://www.irs.gov/credits-deductions/advance-child-tax-credit-payments-in-2021
