Natural gas is found in deep underground rock formations or associated with other hydrocarbon reservoirs in coal beds and as methane clathrates. Petroleum is another resource and fossil fuel found in close proximity to and with natural gas.
If a notice is not received, contact BFS' TOP call center at 800-304-3107 or TDD 866-297-0517. The available hours are Monday through Friday 7:30 a.m. to 5 p.m. CST. Contact the IRS only if your original refund amount shown on the BFS offset notice differs from the refund amount shown on your tax return.
Since the letter and check or direct deposit usually don't arrive simultaneously, you can always call the IRS if you get a refund check and have questions about the amount. The main IRS toll-free number is (800) 829-1040 or (800) 829-4059 (TDD) for the hearing impaired.