Where to enter estimated PTET payment for Virginia S- Corp on Form 760

[June YW]

I paid quarterly estimated PTET taxes. Should I enter the est. payment on line 20 of Form 760CG? Also, my est. payment is more than the actual PTET taxes, what should I do with the over payment? Should I enter the whole estimated PTET payment or the actual PTEP tax on Line 25, Form 760CR?