Submit. · just now. Report Abuse. It takes IRS 6-12 weeks to process deliquent tax returns. Call IRS at 1-800-829-1954 if these are refund years, they will be able to give you a status of your returns, they will be able to tell if the returns were received and when input on their system.Ms. Angel..· 8 years ago.Thumbs up.t takes IRS 6-12 weeks to process deliquent tax returns. Call IRS at 1-800-829-1954 if these are refund years, they will be able to give you a status of your returns, they will be able to tell if the returns were received and when input on their system. Ms. Angel.. · 8 years ago. Thumbs up.