A/cing entry & GST Credit

Even this is a purchase of subscripttion service right? Same way, repairs & maintenance too is a purchase of service.

If you meant that the voucher type is purchase (instead of journal), this should not be a problem provided the expense is debited to the right account head say computer maintenance in this case.

Input tax credit on the same can be availed as usual.

Pass another entry as:-

Repair and Maintainance Expense A/c Dr

Puchase A/c Cr. (under stock Head which was entered in first entry)

Value for this Entry shall be the amount before GST