The document provides five tips for paying a tax bill to avoid interest and penalties: 1) pay electronically through IRS Direct Pay, EFTPS, or credit/debit card for a quick and safe payment; 2) apply for a payment plan if unable to pay in full; 3) consider a direct debit pay plan for lower fees; 4) check if eligible for an offer in compromise to settle the tax debt for less than owed; and 5) pay by check or money order with contact information.