The following points should be completed before you go into production.
Connection & basics
Connection tested successfully
Suitable authentication method selected
Initial data loaded
Mappings
Taxes mapped (see Taxes & Tax Mapping)
Payment methods and shipping methods mapped
Default currency, sales channel, and customer group marked
Salutations & countries maintained
Data
Test item uploaded successfully and verified in the shop
Prices and inventory transferred correctly
Test order created successfully as a sales order in BC
Operations
Automation set up
Monitoring routine defined (Activity Log)
Responsible contacts and Support Contacts known
Only once all points are complete should you start processing real orders and take the shop live.