How do i find Current Consumed by Circuit designed on Surface mount PCB without damaging PCB?
Standard way to measure currents on PCB where all components are already integrated (AC, transformer, secondary coil, diode bridge, regulator) is to make a narrow trace cut between the regulator and the rest of the circuit, and measure the current either by a fixed-range DMM, or placing a current-sense resistor (say, 0.1 Ohms SMT 0805) across the cut, and measure small voltage across it. Then you either leave the sensing resistor to continue to operate your device, or restore the trace continuity with a solder bridge.

(Suggestion: you can find various small-ohm chip resistors on all broken hard drive electronics or old dead CD-ROMs.)