You may send estimated tax payments with form 1040-es by mail (postmarked by the due date), pay online , by phone, or from your mobile device using the irs2go app. If paying by check, taxpayers should be sure to make the check payable to the "united states treasury. "the best way to make a payment is through the irs online account, according to the irs. There taxpayers can see their payment history, any pending payments and other useful tax information. Taxpayers can make an estimated tax payment by using irs direct pay ; debit card, credit card or digital wallet ;or the treasury department's electronic federal tax payment system (eftps). Are you an american living in another country who’s not sure how to pay united states expat taxes? you’re far from alone — in fact, many don’t even know whether or not they need to file taxes. Unfortunately, for those who do need to, filing taxes from abroad is often more complex than filing them from within the us. For one, expats must often claim exemptions or credits to avoid double taxation. On top of that, they may also have to report foreign -registered businesses, bank accounts,