According to the IRS, people who did not file on time can still apply for a stimulus check but only if they meet eligibility requirements. The request for a stimulus package must include the past date the person wants to receive in the stimulus check.
The IRS includes a list of forms on its website that a person must fill out to be eligible to receive the check. Filling out the forms does not guarantee retroactive payment. The applicant will not receive a denial from the IRS for filing late. However, the applicant could still be denied based on qualifying annual income or other factors.