GST Refund of ITC

You can not get refund of ITC balance in your credit ledger. You can only set of your credit balance against output tax liability arise on sale of goods.

and if you are planning to cancel your propritership GST in near future, than at that time if you have any closing stock of Goods than you are required to reverse the credit taken on that stock.

And also note that at time of cancellation you have to reverse the credit of capital goods(fixed assets) purchase, ITC taken but if used for less than 60 months at time of cancellation.

You can transfer your inputs, Capital goods to partnership firm by issuing Tax Invoice as prescribed in Section 31 of CGST Act .