To fill out IRS forms online, follow these steps: 1. Visit the official IRS website: Go to www.irs.gov, which is the official website of the Internal Revenue Service. 2. Select the form you need: Navigate to the "Forms & Instructions" section of the IRS website. Here, you can find various forms and publications organized by tax year, form number, and category. Choose the specific form you need to fill out. 3. Use the online fillable forms: Many IRS forms are available in an online fillable format. Look for the "Access Online Forms" or "Fillable Forms" section on the specific form's page. Click on the hyperlink provided for the online fillable version. 4. Open the form: The online fillable form will open in your web browser. Review the form's instructions and make sure you have all the necessary information and documents to complete it. 5. Fill out the form: Click on the fields in the form and enter the required information. The online fillable forms usually have interactive features that help you navigate through the form easily. You can also save your progress and return to complete it later, should you need to. 6. Verify your entries: Before submitting the form, carefully review all the information you provided to ensure accuracy. Mistakes or incorrect information may lead to processing delays or potential penalties. 7. Sign the form: Depending on the form, you may need to electronically sign it. Follow the instructions provided on the form to sign electronically. If you're filing a joint return, both you and your spouse typically need to sign the form. 8. Submit the form: Once you've completed and verified the form, submit it electronically using the instructions provided on the form. The IRS website will typically have a "Submit" or "File" button to initiate the submission process. 9. Retain a copy: After submitting the form, make sure to save a digital copy for your records. You can download and save a PDF of the completed form from the IRS website. Note: Some forms may not be available in an online fillable format. In such cases, you can still download the form in PDF format, print it, fill it out by hand, and then mail it to the IRS.