A clarifying question as I am in a similar situation for 2025 but slightly different circumstances. I have a large long-term capital gain in Q1 of 2025. I am not currently working so do not have any active withholdings. Can I avoid underpayment penalties by paying the full safe harbor amount before 4/15/25 (110% of my 2024 taxes liability) or do I need to pay the full estimated tax on the gain by 4/15/25? I am hoping that if I satisfy the safe harbor in Q1 2025, I will not have to pay the balance due until 4/15/26 with my 2025 taxes but absolutely do not want to be subject to any underpayment penalties.
