A taxpayer has no prior-year tax liability (prior-year tax was $0). The prior-year safe harbor for estimated taxes:
- Results in no required estimated payments - provided the prior year covered a full 12-month period and the taxpayer was a U.S. citizen or resident for the entire prior year: 100% of 0 required. (correct answer)
- Still requires estimated payments of $1,000 as a minimum.
- Does not apply - taxpayers with zero prior-year liability must use the 90% of current year safe harbor.
- Requires estimated payments based on the current year projected income.
Explanation: Under Section 6654(e)(2), if the prior year's tax was 1,000 is required under the prior-year safe harbor when prior-year tax was zero (B). The prior-year safe harbor remains available with a zero result (C). Current-year projections are not required under this safe harbor (D).