Find out if back taxes are owed to the Internal Revenue Service by calling the toll-free number at 1-800-829-1040 or visiting a local IRS office. Phone services are available Monday through Friday between 7:00 a.m. and 7:00 p.m. in each local time zone, according to the official website.
The IRS also sends notices on past due accounts that list the amount owed. People can pay a tax bill with a check, money order, credit or debit card or electronic funds transfer. If an individual cannot pay all of the taxes owed, he can request a payment plan by submitting Form 9465, Installment Agreement Request, to the IRS, notes the official website.
Individuals who owe less than $25,000 can submit an Online Payment Agreement. Individuals owing more than $25,000 may still qualify for an installment plan but must first submit Form 433F, Collection Information Statement. The IRS generally responds to installment plan requests within 30 days. If the payment plan is approved, the IRS charges a $105 fee. The fee is reduced to $52 if payments are automatically deducted from a bank account. According to the IRS, individuals may also reduce the amount of taxes owed by adjusting a W-4 to increase the amount of taxes withheld from each paycheck.