Taxable Income from in plan Roth conversion

i received taxable income for an in plan roth conversion (from 401k to Roth) done in April 2024 from plan administrator. My questions are;

 

1) When should the taxes on the roth conversion taxable income be paid by without penalties ?. Is it to be paid in 2024 itself or after i receive 1099-R in early 2025 and before April 2025 ?. 

 

2) If the taxes have to be paid in 2024, is there a way to calculate 2024 estimated taxes in Turbotax ?. By what date should the estimated taxes be paid by in 2024?.