What this notice is about The installment payment is due for your IRC Section 965 tax liability. What you need to do Make your annual installment payment on time as required by IRC Section 965(h). Frequently asked questions Will I be penalized if I can't pay the full installment amount by the due date? Yes. You may be penalized for failure to pay and the full amount of your net tax liability may become due immediately. Can I elect that an overpayment of my installment be credited to a subsequent tax year or refunded to me if there is an outstanding balance on my IRC Section 965 tax liability? See Questions and Answers about Reporting Related to Section 965 on 2017 Tax Returns Question 14 and/or Questions and Answers about Tax Year 2018 Reporting and Payments Arising under Section 965 Questions 3 & 4. What should I do if I disagree with the notice? Call the toll-free number listed on your notice to review your account with a representative. Be sure to have your account information available when you call. Reference Tools Publication 1, Your Rights as a TaxpayerPDF Publication 5292, How to Calculate Section 965 Amounts and Elections Available to TaxpayersPDF Full List of tax forms and instructions Need Help? You can authorize someone to contact the IRS on your behalf. If you can’t find what you need online, call the IRS number at the top of your notice or letter.