The IRS is processing e-filed returns, they are not processing mailed in returns until they re-open. States are processing returns.
For Federal all you can do now is keep checking the IRS website, Where's My Refund, the website updates once a day.
https://www.irs.gov/refunds
How do I track my state refund?
https://ttlc.intuit.com/community/refund-status/help/how-do-i-track-my-state-refund/00/25571
