My work permit is expiring on 22nd jan and is already in extension and i should receive it soon.
Meanwhile, i want to apply for visitor visa for my parents and it requires my work permit.
Can i submit the current one which is expiring on 22nd jan and attach a letter with it that the extension in process?
Will they consider that?
Since your parents' visitor visa will be determined based on their ability to pay and their ties to their home country and their purpose of visit, sure you can. You can.
Their visa will be approved or refused based on their profile, not yours.