Refund deposit slightly higher than TurboTax filed

[person_of_interest]

I see the pending direct deposit from IRS, but the refund amount is about $7.xx higher than Turbotax calculated/submitted.  I'm curious where the difference comes from - how do I check the reason?

(I did have $500 missing from 1st COVID stimulus - would it be interest on that?)

[Critter-3]

The IRS is paying interest on your refund which sadly is taxable on the 2021 return. The IRS will mail you a notice next January reminding you to put this interest on the 2021 return.