The Internal Revenue Service said Friday it would restart issuing its 500 series of balance-due notices to taxpayers later this month after they were paused on May 9 due to the COVID-19 pandemic.
While the IRS continued to issue most of its notices, the 500 series was temporarily suspended because of a backlog of mail that built up at the IRS while many employees were away from agency facilities due to COVID-19. The IRS came under fire earlier this year for issuing balance due notices with the incorrect dates to taxpayers during the pandemic and agreed to stop sending the notices until it caught up with its backlog of unopened mail (see story).
Kevin Busque is head of Gusto Retirement, where he leads the company's efforts to expand access to retirement plans for small businesses and their employees. He founded Guideline, a fee-free 401(k) platform acquired by Gusto in 2025. Before Guideline, he co-founded TaskRabbit, the online marketplace that connects people with local service providers and helped scale it through its acquisition by Ikea in 2017.
Bill Pappas is MetLife's Head of Global Technology and Operations, and is a Corporate Officer and a member of the company's Executive Leadership Team. In this role, he directs a team of more than 38,000 people responsible for technology development, infrastructure, information and cyber security, data strategy and analytics, customer service, operations, crisis management, business continuity and procurement for all lines of business, serving more than 90-million customers across 40+ countries around the world.
Pappas joined MetLife in 2019 from Bank of America, where he was the head of operations for the consumer, small business, wealth management and private banking businesses. In this role, he directed a team comprised of more than 50,000 people delivering integrated service and operations solutions to approximately 63-million consumers and clients. In addition, Pappas led the global business services team that provided integrated technology solutions across Bank of America.
Previously, Pappas was chief information officer for Bank of America's global wholesale banking business, head of global capital markets operations, and head of technology and operations for the Europe, Middle East & Africa, Latin America and Asia Pacific regions. He also served as the global treasury payment operations executive based out of London.
The IRS said Friday that it has now caught up enough with its mail backlog to account for payments that are mailed on a timely basis. Some taxpayers will start seeing updated 500 series notices with current issuance and payment dates in late October or early November.
The 500 series of balance due notices includes three different types of notices that warn taxpayers about different stages of nonpayment: the CP501, the CP503 and the CP504.

The CP501 notice tells taxpayers they still have a balance due and what their options are, while the CP503 lets them know the IRS hasn’t heard from them yet and they may be subject to a tax lien if they don’t pay their taxes. The CP504 alerts taxpayers they need to pay their balances immediately or face the possibility of a levy of their state income tax refunds. The 500 series of notices are typically sent to taxpayers if they don’t respond to or pay their initial notice and demand on the CP14 letter.
Despite the resumption of the notices, the IRS is still in the process of catching up on millions of pieces of unopened mail, prompting a letter this week from Democrats on the House Ways and Means Oversight Subcommittee asking if the IRS will be ready in time for next tax season (see story). They also asked the IRS this week about why it was sending out notices revoking the tax-exempt status of over 30,000 nonprofits despite an extension it was supposed to have granted them for filing the Form 990 during the pandemic while it’s in the midst of processing the backlog of unopened correspondence. Earlier this month, IRS Commissioner Chuck Rettig told another House oversight subcommittee that the IRS was still processing 5.3 unopened million pieces of mail, including 2.5 million paper tax returns.
The IRS is encouraging taxpayers who can’t pay to consider some of the available payment options while penalties and interest continue to accrue.
The IRS noted that taxpayers who were affected by the pandemic or other circumstances may qualify for relief from penalties due to reasonable cause if they’ve made an effort to comply with the requirements of the law, but couldn’t meet their tax obligations, due to facts and circumstances beyond their control. Taxpayers should call the toll-free number listed on their notice to ask for penalty relief due to reasonable cause if they believe they qualify and have the supporting documentation to prove it. More information on reasonable cause relief can be found on a page at IRS.gov. Payment options and extra information can also be found on another page of IRS.gov.


