Can i map customer details with qb without having gst registrtaion number and typy

Yes, you can definitely import customers without the GST registration number and type, accounts-deserts.

You can select any GST Registration Type such as Email, Phone Number just for you to proceed in importing your customer. Also, you can use No Match in the fields that you don't have any information yet. No worries, when you have these details, you can update the customer's profile anytime.

When you're done mapping the fields in Step 2, click Next. The GST REGISTRATION TPYE column will be highlighted in red, just click each drop-down and select GST unregistered. Then, click Import. 

For more details in importing your data, you can use these articles: 

• Common questions about importing data to QuickBooks Online
• Connect bank and credit card accounts to QuickBooks Online

Let me know if you have other questions. Take care and have a great day!