The IRS2Go app can now be used to make payments, as well as check refund status and receive tax tips.
IRS2Go Version 5.2 now provides access to mobile-friendly payment options such as IRS Direct Pay, a free and secure way to pay tax bills or estimated taxes directly from a bank account. (The IRS also points out that it doesn’t retain account information after payments.)
Available in English and Spanish, the app allows for checking the refund status of an e-filed federal income tax return within 24 hours after the IRS receives the return.
IRS2Go is on Google Play and Amazon, where users on both sites gave the app four out of five possible stars; and on iTunes.
This option may be of interest to you so you do not have to mail in estimated tax payment vouchers to the IRS.