The Oregon 40 Esv form is an essential document for individuals who need to make estimated income tax payments in Oregon. This form, officially titled the Oregon Estimated Income Tax Payment Voucher, is designed to help taxpayers report and remit their estimated tax payments to the Oregon Department of Revenue. It is crucial for those who anticipate owing taxes at the end of the year and want to avoid penalties for underpayment. The form includes sections for personal information, such as the taxpayer's name, Social Security number, and contact details, as well as spaces to indicate the payment amount. Taxpayers must also be aware of the quarterly payment deadlines, which fall on specific dates throughout the year. For those filing for the first time or making joint payments with a spouse or registered domestic partner, the form provides clear instructions to ensure accurate completion. After filling out the form, individuals should print it, cut along the designated line, and mail it to the appropriate address in Salem, Oregon. Proper adherence to these guidelines will facilitate timely processing of payments and help maintain compliance with state tax regulations.