Paid lower than minimum wages act - typist as Rs. 12000, driver as Rs. 10500 in Uttarakhand

By mistake, I have shown the basic salary of a typist as Rs. 12000, who left after three months, and for a driver as Rs. 10500, who left after two months in Uttarakhand.
Now, what could be the maximum penalty? Can this mistake be undone?
Well, the designation is not mentioned anywhere in the salary slip. It's only in the Joining form. Should I tear off the joining form? Or strike it and change the designation to something like helper?

You need not change the joining forms but just calculate the actual wages and pay the difference amount. That is enough for now.

What about EPF incorrect share that was paid that's bigger issue

You had paid the EPF on the salary that you had paid, right? Then it is not incorrect payment. Now you are paying an arrear of salary. You can deduct PF from that payment and pay it in the month of its payment. While remitting, you should not remit the amount as omitted wages but it should be paid as arrear of salary paid now. Since it is an arrear payment, it will not attract ESI, if any.