The IRS has not been processing tax returns for awhile due to staff shortages and the stimulus payment launch. They have now been processing returns for the last few days. In normal times, the IRS processes returns within 21 days for most filers. Some even took longer in normal times. There's no way to predict how long yours will take. All you can do is track the status using the IRS tracking web site: https://www.irs.gov/refunds
See this IRS Q&A for how the process works: https://www.irs.gov/refunds/tax-season-refund-frequently-asked-questions
