Retirement tax questions

Thank you. Spreading the conversion Traditional IRA to Roth IRA conversion between now and 2025 sounds like the best solution for me.

 

Since I am never sure of my modified adjusted gross  until I do my taxes,  what is the best way for one to backdoor Roth the maximum maximum they can in a year without jumping to a new tax bracket? Should I just do the conversion late every December and guess what my final income for the year is going to be?