ugh - IRS can't even spare this first time "offender" - the penalty assessment is from my underpayment (actually, non-payment) of estimated tax :(( I've paid my withholding in full every year in the past (through W2 withholding tax) .
So for 2026, I assume I will just divide the total tax owed for 2025 by 4 to make quarterly payments? Can I pay just 90% for each quarter?
