can you put the return line to the pump inlet?

for an efi system with fuel return at the regulator, can you have a t fitting at the pump inlet and put the fuel back there?
Is that a problem?
I guess I am asking why pump directly back to the tank?

I think on some systems it is that way like on trucks, but in my opinion you want it to return after getting to the motor for at least two reasons.

one cooler fuel because the fuel does not sit in the lines long as it is constantly circulating.

Two you have the correct fuel presure at the efi unit at all times

With the regulator and return at the rear you have no idea what type of presure drop off you have have at the efi unit during hard throttle conditions