It’s

To settle your tax bill, the best option is to transfer the money electronically from your bank account to the IRS by April 15 with no fees. A debit card can be used with a small fee of less than $3. Avoid credit cards due to "convenience fees" of 2%-4% of your bill. Alternatively, you can mail a check, making it payable to the United States Treasury and sending it certified mail, return receipt requested. Detailed information can be found at https://irs.gov/payment.