How do I unlock my tablet, can't remember the pin I used

On the RCA tablets if you cant remember your password and have to do a hard reset on it you power it off first then when you go to turn it back on hold the power button and volume up button at the same time. When the picture of the dogs come on the screen hold the power and volume up button for 2 seconds and release. After the screen loads you should get the android on the screen and it should say no command at this point hold the volume up button for 5 seconds then a menu will come up allowing you to wipe and reset the tablet. Hope this helps