I received the following from the IRS:
Notice 1451 corrects an error found on the IRA Deduction Worksheet — Schedule 1, Line 19 in the 2020 Instructions for Forms 1040 and 1040-SR: Line 3 of the worksheet should read “Enter the amount from Form 1040 or 1040-SR, line 9.”
I have placed Notice 1451 into the Instruction booklets for Forms 1040 and 1040-SR that are currently at the Bouncer Station and on the counter at the Reference Desk. I have made copies of Notice 1451 and placed them in a manila envelope in the box with the 1040/1040-SR booklets.
Before placing 1040/1040-SR booklets out for the public, please make sure that a copy of Notice 1451 has been tucked into the booklet. Errata Sheet Forms 1040 and 1040SR