If you have mailed a check to the IRS with or without a tax return, it may still be unopened in the backlog of mail the IRS is processing due to COVID-19. Any payments will be posted as the date IRS received them rather than the date the agency processed them. To avoid penalties and interest, the IRS is encouraging taxpayers NOT TO CANCEL their checks and ensure funds continue to be available so the IRS can process them. To provide fair and equitable treatment, the IRS is providing relief from bad check penalties for dishonored checks the agency received between March 1 and July 15 due to delays in IRS processing. However, interest and penalties may still apply.
Due to high call volumes, the IRS suggests waiting to contact the agency about any unprocessed paper payments still pending. See www.irs.gov/payments for options to make payments other than by mail.