Did you e-file his return?  Was it accepted?  If it was accepted you can check the status of his Federal refund on the IRS website, Where's My Refund.  Where’s My Refund? now provides refund information for the 2021, 2020, and 2019 tax years.

https://www.irs.gov/refunds

If you have a State refund, you can track it on yours State's website:

How do I track my state refund?

https://ttlc.intuit.com/turbotax-support/en-us/help-article/tax-refund/track-state-refund/L3jgO8PGs_...