What is a Tax Professional's correct response to a taxpayer who omitted items on an income tax return that was submitted in a previous year?

Advise the taxpayer promptly of the fact of such omission and:

Refuse to prepare the current-year return until the previous year is amended.

Advise the taxpayer of the consequences of not amending the previous year's return.

Make an adjustment for the previous year's omission on the current-year return. Refer the taxpayer to an office supervisor