How do I pay my federal or state estimated taxes?

There are various ways to pay estimated taxes to the IRS or state: 

1. Online: Pay the IRS or state directly online through your choice of payment options they offer.
2. Mail-in Voucher (1040-ES): Mail a check or money order to the IRS or state with the printed voucher that indicates the amount you owe. 
   

By staying on top of your estimated payments, you can avoid accruing substantial penalties and interest.