After tiring of overly complicated models and spreadsheet, I did something similar. I included a column showing total funds across all assets as well as a column for taxable and non-taxable income (non tIRA withdrawals). I agree with the suggestions to hide columns, or copy a few to another tab, or even just highlight or bold key columns. I also hid rows so that from age 70, follow: 75, 80, 90, 100. I think it looks a lot cleaner and I don't need to dig into the differences in balances, income, or taxes between ages 86 and 87.