@MeNombreEsEarle ignore the smaller Q2 month, the estimated tax and penalty calculations treat each quarter equally and divide everything (total tax, withholding etc) by 4 regardless of when it was earned. If you adopt the AI method due to a large income event then it gets more precise and you have to specify income by 3/31, 5/31, 8/31, 12/31.
In your case it sounds like you paid Q1 ES based on prior year tax which will be an overpayment on ES given your updated 2025 situation based on 90% of 2025 tax less withholding, sounds like you've done that calculation. If your Q1 payment was above that quarterly amount it will carry forward to the next quarters and you need to pay in Q2 whatever amount gets you to 50% of the total ES, 75% by Q3, 100% by Q4. If Q1 covered more than 50% I don't think you need to pay anything for Q2 ES, it won't make any difference.
