What will you need to live? That will determine your tax bracket. If you are debt free and own your home it should be lower. If you have a lot of deductions that will go away and expenses that rise faster than inflation, it will probably be higher. If you are in a low bracket now, it will probably be higher. If you are in a high bracket now, it will probably be lower. Mine is much, much lower as now I largely live off after tax savings but will increase some once I tap deferred accounts. The Tax Foundation
compiles all sorts of tax information across states.