Question: how to change google account on samsung a20?
Answer: From a Home screen, swipe up from the center of the display to access the apps screen. ... 
Navigate: Settings. ... 
Tap Add account.
Tap Google. ... 
Enter the Gmail address then tap Next (lower-right).
Enter the Password then tap Next.
To continue, review the Terms of Service and Privacy Policy then tap I agree (lower-right).