Partnership to proprietorship

Hi:

I have a partnership firm with 3 other silent partners. I have successfully obtained the GSTIN last month after uploading all supporting documents. 

I wish to convert this firm into proprietorship under my name, to reduce tax liability of 30% for firms. All partners are willing to this. Will I be able to retain the same GSTIN, firm name, bank account etc ? Is a simple stamp paper stating the cause and signed by all partners sufficient?