Montecfo
Give me a museum and I'll fill it. (Picasso) Give me a forum ...
I agree with you that the potential change in rate schedule to single is a big issue. On rates on general, I expect them to rise but not dramatically.I am not considering a future change in tax rates. They may go up and they may go down. 5 years ago, I doubt anyone would have predicted the reduction that took place. For my analysis, I assume that they will stay as they are now, knowing that they will most likely change one way or the other. Also, if they do go up, I assume that one will have at least one tax season to take action before the effect of the new rates.
Due to the stepped nature of the tax brackets, I believe that by recognizing income to bring one up to the bottom of the next tax bracket may reduce taxes in the RMD years. This is why the change in brackets from married to single is probably the biggest thing to think about.
I think filling up your low brackets while you can is least risky. If you prepay taxes aggressively over several years and then have a big market decline, you would probably wish you had some of the tax money back.
Predictions are hard. Especially about the future.