Submitting a tax-exempt application to the IRS as soon as possible is also crucial because it takes the IRS a long time to review applications. Generally, 1023 Long applications take six to nine months for IRS review. 1023 EZ applications are typically a little quicker, but only sometimes. Depending on seasonality, we see these approved in two to six months. More recently, these are being approved by the IRS in as little as three to six weeks.