Because all changes that affect me are simply changing numbers (some will go to zero), my current estimated tax spreadsheets will still work thankfully. The numbers have to be updated annually anyway.
I’m relieved because I am using the annualized income method for estimating taxes next year since I expect our 2018 income to be half or less than this year’s income. Safe harbor rules would have me way overpaying estimated taxes.
Retired since summer 1999.