Follow the steps to accurately complete the IL HFS 3416D form.

1. Click 'Get Form' button to access the form and open it in your preferred editing tool. This allows you to input your information directly into the document.
2. Begin by entering the child's information as it will appear on the birth certificate. Fill in fields for the child's first name, middle name (if applicable), last name, date of birth, gender, and place of birth, including city, county, and state.
3. Next, provide details for the presumed parent. Include their first name, middle name, last name, suffix, date of birth, and place of birth. Additionally, fill in the presumed parent's address and daytime phone number.
4. Enter the biological mother’s information, including their first name, middle name, current last name, maiden name (if applicable), date of birth, address, and daytime phone number.
5. Complete the section regarding the date of marriage or civil union, ensuring to provide accurate details as required.
6. Both the presumed parent and the biological mother must sign and date the form in front of a witness aged eighteen or older. Ensure that the witness is not named on the form.
7. After all sections are filled and signatures obtained, review the form for any errors. Make necessary corrections to avoid rejection.
8. Finally, save changes, download a copy of the completed form, and prepare to print if necessary. Once everything is in order, follow the instructions for filing the document with the Department of Healthcare and Family Services.

Complete your documents online to ensure accurate processing and adherence to legal requirements.