7 of 15 Tobin is a paid tax preparer and has recently received his Enrolled Agent designation. Which of the following can Tobin use to describe his new designation? 1. Tobin works for the Internal Revenue Service as a Registered Tax Return Preparer. 2. Tobin is certified by the Internal Revenue Service to prepare returns. 3. Tobin is certified by the Internal Revenue Service as a Tax Expert. 4. Tobin is designated as an Enrolled Agent by the Internal Revenue Service.