The IRS recently revised Form 4506 Request for Copy of Tax Return (rev. March 2019).  The revisions are minimal text changes only, which include correcting the reference to “line 5” so that it read as “line 5a” on page 2 (in the “Signature by a representative” paragraph), and one mailing address change on page 2 (in the third list of states in the first column). The revised Form 4506 is now available from the IRS website and may be used immediately.

Link to Revised Form 4506