When editing the 1040 letter State Paragraph it appears to me that the "State Due Date" code is NOT filling in the 'data / date' in the letter. It is merely replicating the Letter code. OR am I doing somethign wrong ?  see below ......

[@XXXEFDo]
Your <@XXXStName> return will be electronically filed when we receive your signed State e-file Signature Authorization. The <@XXXStName> return due date is <@XXXEFDate>.

Should read:

Your (State) return will be electronically filed when we receive your signed State e-file Signature Authorization. The (State Form Name) return due date is April 15, 2021.

Instead it reads:

Your (State) return will be electronically filed when we receive your signed State e-file Signature Authorization. The (State Form Name ) return due date is <@stateEFDate>.